How to Clean and Disinfect a Mattress — The Complete 2026 Guide

To clean and sanitise a mattress, strip all bedding and wash it in hot water. Vacuum the entire surface with an upholstery attachment: top, sides and crevices. Spot-treat stains with a targeted solution matched to the stain type: equal parts white vinegar and cool water for general freshening, enzyme cleaner for organic stains like sweat and urine, cold water and enzyme treatment for blood. Blot, never scrub. Sprinkle a generous layer of baking soda across the entire mattress top, leave for at least 30 minutes to several hours, then vacuum thoroughly. Open windows or run a fan to let the mattress air out completely before replacing bedding. Do not soak the mattress; any liquid reaching the inner foam or coils is difficult to dry and promotes mould.

Check this process

Strip and vacuum:

• Remove all sheets, pillowcases and mattress protectors — wash in hot water
• Use a vacuum with an upholstery attachment
• Vacuum the top, sides and crevices to remove dust, hair and dead skin cells

Spot clean and sanitise stains:

• Mix equal parts white vinegar and cool water in a spray bottle for general freshening
• Lightly mist the surface without soaking the foam or inner layers
• Use a mild dish soap mixture or enzyme cleaner to break down organic proteins like sweat or urine
• Blot stains gently with a clean cloth instead of scrubbing hard

Deodorise and air out:

• Sprinkle a generous, even layer of baking soda across the entire mattress top
• Leave for at least 30 minutes to several hours to absorb moisture and lingering smells
• Vacuum up all baking soda thoroughly
• Open windows or use a fan to let the mattress air completely before replacing bedding

Most people wash their sheets every week or two. Almost nobody cleans the mattress underneath.

It sounds like an oversight. It is more significant than it sounds. A typical mattress used for two years without cleaning accumulates litres of absorbed sweat, significant dust mite populations and their allergen-producing waste, plus skin cell buildup, mould spore development in humid conditions, and whatever staining events have happened in the interval.

None of this is visible from the top of a made bed. The mattress looks fine. Under the sheets, a different situation is developing.

This guide covers the complete mattress cleaning and disinfecting process, from stripping to air-out, plus specific solutions for each stain type and honest guidance on what household cleaning can achieve versus what professional steam cleaning addresses more thoroughly.

How Often Should a Mattress Be Cleaned?

Before getting into the method, the frequency question matters.

Every six months as a minimum. Consumer Reports, Sleep Foundation and most mattress manufacturers recommend cleaning every six months. For households with allergies, asthma, pets or young children, every three months is more appropriate.

Immediately when any of these happen:

• Urine — fresh or dried (child or pet)
• Vomit
• Blood
• Any liquid spill that reaches the mattress surface
• Noticeable odour from the mattress itself

Signs the mattress needs cleaning now:

• Yellow or brown staining developing through the mattress protector
• A musty smell that does not clear after washing the bedding
• Increased allergy symptoms at night that improve when sleeping elsewhere
• Visible dark spots developing on the surface — potential mould or mildew

What You Need Before Starting

Gather everything before stripping the bed; complete the full process in one session so the mattress isn’t left damp or exposed for extended periods.

For standard cleaning:

• Vacuum cleaner with upholstery attachment
• Spray bottle
• White vinegar
• Cool water
• Baking soda (a full box for a queen or king, half a box for a single or double)
• Clean white cloths or paper towels (white coloured cloths transfer dye)
• A fan or access to natural cross-ventilation

For stain treatment (add what applies):

• Mild dish soap (for organic stains)
• Enzyme cleaner (for urine, sweat and biological staining available at supermarkets and pet stores)
• Hydrogen peroxide at 3% (for blood stains on light mattresses; test first)
• Cold water specifically (for blood; warm water sets it)

What to avoid:

• Soaking the mattress with any liquid
• Hot water on blood stains
• Harsh chemical sprays not designed for fabric surfaces
• Bleach (damages fabric and leaves residue)
• Rubbing or scrubbing any stain

Step 1: Strip and Vacuum

Strip all bedding

Remove all sheets, pillowcases, mattress protectors and any mattress toppers. Wash everything in hot water at the highest temperature the fabric care label permits. Hot water kills dust mites in fabric. Cold or warm water reduces some populations but does not achieve the same reduction.

Run the wash cycle now, before starting on the mattress, so the bedding has time to dry while you clean the mattress.

Vacuum the entire mattress thoroughly

Use a vacuum cleaner with an upholstery attachment. Vacuum the top, sides and all crevices to remove dust, hair and dead skin cells.

The upholstery attachment matters. A bare floor head doesn’t provide the same suction contact on a soft, uneven mattress surface as a dedicated upholstery tool. The suction needs direct contact with the mattress fabric to pull particles upward from the surface layer.

Technique:

• Work in slow, overlapping rows across the top surface
• Vacuum all four sides; dust accumulates in the side seams where the mattress handle attachments create crevice areas
• Pay particular attention to the head-end third of the mattress where scalp oils and hair deposit at higher rates
• Flip the mattress if you plan to clean both sides (relevant for innerspring and two-sided mattresses; memory foam is single-sided)

If you have a HEPA-filter vacuum, use it here. HEPA filtration captures fine dust mite allergen particles down to 0.3 microns rather than recirculating them into the bedroom air during vacuuming.

Step 2: Spot Clean and Sanitise Stains

Different stains need different chemistry. The most important part of mattress stain treatment, even more than which solution you use, is how you apply it.

The overriding rule: lightly mist, never soak.

Any liquid that reaches the inner foam or coil layers of a mattress is extremely difficult to dry completely. Inner foam layers do not evaporate moisture quickly in a standard bedroom environment. Damp foam creates the exact warm, humid, dark conditions that mould spores need to establish. A heavily soaked mattress can take days to dry completely from the interior and may never fully dry in less favourable conditions.

Apply any liquid to a cloth rather than directly to the mattress wherever possible. Where you must spray the mattress directly, use a fine mist, not a soaking spray.

For general freshening and light surface cleaning

Mix equal parts white vinegar and cool water in a spray bottle. Lightly mist the entire mattress surface, not until wet, just until the surface appears uniformly damp. The vinegar solution neutralises surface odours and addresses light bacterial surface contamination.

Leave for five to ten minutes.s Blot with a clean, dry cloth. Do not wipe or rub. Move to the baking soda stage.

For sweat staining

Sweat staining produces the characteristic yellow or brown discolouration that develops across the body contact areas of a mattress over time. The staining compound is a combination of dried sweat salts, sebum (skin oil) and dead skin cells.

Solution:

• 1 tablespoon mild dish soap
• 1 cup cool water
• 1 tablespoon white vinegar

Mix gently. Apply to a clean cloth; do not spray directly onto the mattress. Dab and blot from outside the stain inward. Light pressure. Switch to a clean section of the cloth as the stain transfers. Rinse by blotting with a cloth dampened in plain cold water. Press dry with a clean, dry cloth.

For urine stains

Urine requires enzyme cleaner rather than a general cleaning solution. The staining compound in urine includes uric acid crystals that standard cleaning agents do not break down. Enzyme cleaners use biological enzymes that target and dissolve uric acid at the molecular level, the source of the persistent smell that returns in humid weather.

For fresh urine:

Blot immediately with dry cloths; absorb as much liquid as possible before applying anything. Do not rub. Apply enzyme cleaner to a cloth (or lightly to the mattress surface, according to product instructions), leave for 10 to 15 minutes for the enzymes to work, then blot and allow to air dry before the baking soda stage.

For dried urine stains:

Lightly dampen the stained area with cool water to rehydrate the dried uric acid crystals. Apply enzyme cleaner and leave for 15 to 20 minutes. Blot thoroughly. Any remaining odour after drying, indicating uric acid in deeper foam layers,s may require professional steam extraction to address fully.

For blood stains

Cold water only for blood. Always. Hot or warm water sets blood protein into the mattress fabric permanently, in the same way hot water sets blood into any fabric. This is the single most common mistake that turns a removable blood stain into a permanent one.

For fresh blood:

• Cold water on a cloth; blot immediately
• Cold water alone often removes most of a fresh blood stain from the surface
• For residual staining: mix a small amount of mild dish soap with cold water, apply to a cloth, blot gently

For dried blood on a light-coloured mattress:

• 3% hydrogen peroxide to the stain,n with a cloth test on a hidden area first
• The fizzing reaction oxidises the dried blood compound
• Blot, do not rub
• Rinse with cold water on a cloth
• Do not use hydrogen peroxide on dark or patterned mattress fabric; bleaching risk

For dried blood on any mattress colour:

• Enzyme cleaner works on blood as a protein compound
• Rehydrate the dried stain slightly with cool water first
• Apply enzyme cleaner, leave 10 to 15 minutes, blot thoroughly

For vomit

Remove all solid material first using a spoon or gloved hand, working from the edges inward. Apply a solution of mild dish soap and cool water to a cloth and blot the affected area. Apply an enzyme cleaner to break down protein and biological compounds. Leave for ten to fifteen minutes. Blot. Follow with the baking soda deodorising stage concentrated on the affected area.

Step 3: Deodorise with Baking Soda

Baking soda deodorises a mattress by neutralising acidic odour compounds through a direct alkaline-acid reaction. This is not a masking effect;t it chemically neutralises sweat acids, urine acids and biological odour compounds.

Sprinkle a generous, even layer of baking soda across the entire mattress top. For a single mattress: half a standard box. For a queen or king: a full box. This is not the moment to be conservative; a thin dusting produces thin results.

Spread it evenly using your hand or a soft brush so the entire surface is covered with a visible white layer.

Leave for at least 30 minutes to several hours. The AI Overview specifies “at least 30 minutes to several hours”, and several hours is genuinely better. For significant odour issues or after a urine event: leave overnight. The longer the baking soda sits, the more moisture and odour compounds it draws upward from the mattress fabric.

While the baking soda works, open the bedroom windows if possible. The cross-ventilation helps draw moisture from the mattress and begins the airing process the final step requires.

Vacuum up all baking soda thoroughly. Use slow, overlapping passes with the upholstery attachment. The baking soda will have drawn moisture upward from the mattress during the dwell period and may feel slightly damp; this is expected. Thorough vacuuming removes it all.

Leaving baking soda residue in the mattress attracts moisture and re-soils faster than a clean mattress surface.

Step 4: Air Out Completely

Open bedroom windows or use a fan to let the mattress air out completely before putting on fresh bedding.

This step is the one most commonly skipped, and it determines whether all the preceding work holds or reverses.

A mattress that has been spot-cleaned and deodorised is still slightly damp inside from the moisture the cleaning process introduced and the moisture the baking soda drew upward. Placing bedding over a still-damp mattress traps that moisture in the fabric layer and creates conditions for mould and odour to redevelop within days.

Minimum airing time: Two hours in summer with good ventilation. Four to six hours in winter or in rooms with limited airflow.

For best results: Clean the mattress in the morning. Do all steps. Leave windows open throughout the afternoon. Replace bedding in the evening. This is the simplest way to ensure complete drying.

To accelerate drying:

• Place a fan directed across the mattress surface
• Open windows on opposite sides of the room to create cross-ventilation
• On a warm, dry day, consider moving the mattress briefly to a sunlit spot if practical — UV light has natural disinfecting properties on surface bacteria

Mattress Type Considerations

Different mattress types need modified approaches.

Memory foam

Memory foam is the most moisture-sensitive mattress type. It absorbs liquid quickly and releases it slowly. Soaking is particularly risky on memory foam; even a small amount of liquid reaching the inner foam layers can take days to dry and create a significant mould risk.

For memory foam: apply all solutions to a cloth first, then dab. Never spray the mattress surface directly. Use the minimum liquid throughout. Prioritise the baking soda stage for odour removal rather than relying on liquid cleaning solutions.

Innerspring and hybrid

Innerspring mattresses tolerate slightly more moisture than memory foam because the coil structure allows more airflow through the interior. However, the inner layers still retain moisture. The same minimum-liquid principle applies.

Latex

Natural latex has some inherent resistance to dust mites and mould. Cleaning is similar to innerspring: use minimal liquid, blot rather than spray, and air thoroughly. Latex is sensitive to some chemical cleaners—check the mattress manufacturer’s guidance before using anything beyond plain water and baking soda.

Pillow top

The extra comfort layer on a pillow-top mattress creates additional surface area for dust mite accumulation and sweat absorption. Vacuum thoroughly in all directions to address the quilted surface. Baking soda is particularly effective on pillow-top surfaces because the quilted construction provides more contact area for absorption.

When Professional Mattress Cleaning Beats DIY

Household cleaning addresses the surface layer effectively. Professional hot water extraction addresses the foam and fibre layers beneath it.

Consider professional cleaning when:

• The odour from the mattress returns within a few days of DIY cleaning — this indicates contamination (usually urine) in the deeper foam layers that surface cleaning cannot reach
• The mattress has visible mould or dark spots — household cleaning can remove surface mould, but professional steam at 80 to 95 degrees kills mould at the surface and reduces spore load in the fabric
• The mattress is over two years old and has never been professionally cleaned — the dust mite population in the backing layers of a standard mattress at this point is significant
• Someone in the household has allergies or asthma that worsens at night — dust mite allergen (Der p1 protein) accumulates in the mattress at levels that household vacuuming does not reach
• The staining is extensive — a mattress with multiple large staining events through the surface into the foam requires commercial extraction

Professional mattress steam cleaning uses hot water extraction at 80 to 95 degrees, which kills dust mites on contact and extracts their allergen-producing waste from the mattress fabric layer. This is combined with true steam sanitisation of the surface and commercial extraction that removes moisture along with contamination—reducing drying time to two to four hours compared to the natural evaporation of household cleaning.

Ms Clean provides professional mattress steam cleaning across all Adelaide suburbs. Queen mattress cleaning from $95. Fixed price confirmed before work begins. Same-day available across most metro Adelaide areas.

Actionable Takeaways

For regular six-monthly mattress maintenance:

1. Strip all bedding —hot wash everything
2. Vacuum top, sides and crevices with upholstery attachment
3. Light mist of equal parts white vinegar and cool water across the surface
4. Baking soda — generous layer, minimum 30 minutes, overnight if time allows
5. Vacuum baking soda thoroughly
6. Open windows or run fan — minimum two hours before replacing bedding

For a urine or vomit event right now:

1. Blot everything with dry cloths — absorb as much liquid as possible
2. Apply enzyme cleaner to a cloth, dab the affected area
3. Leave enzyme cleaner for 15 minutes
4. Blot, then cover the affected area with extra baking soda
5. Leave overnight, vacuum in the morning
6. Air out fully before replacing bedding

For blood stains:

1. Cold water on a cloth — blot only, no heat
2. Enzyme cleaner or 3% hydrogen peroxide on light mattresses (test first)
3. Blot from outside inward, rinse with cold water

FAQs — How to Clean and Disinfect a Mattress

Q1. How do you clean and disinfect a mattress at home?

Strip all bedding and wash in hot water. Vacuum the top, sides and crevices with an upholstery attachment. Spot-treat stains with a solution matched to the stain type: equal parts white vinegar and cool water for general freshening; enzyme cleaner for urine and sweat; cold water for blood. Blot, never scrub. Sprinkle baking soda generously across the entire mattress top, leave for 30 minutes to several hours, then vacuum thoroughly. Air out completely with windows open or a fan before replacing bedding.

Q2. How long should baking soda sit on a mattress?

At least 30 minutes for routine deodorising. Several hours for significant odour issues. Overnight for urine odour or heavily soiled areas. The longer the baking soda sits, the more moisture and odour compounds it draws upward from the mattress fabric. The mattress must be completely dry to the touch before replacing bedding.

Q3. What is the best solution for mattress urine stains?

Enzyme cleaner. Uric acid crystals in dried urine require enzyme-specific chemistry to break down at the molecular level; general cleaning solutions do not dissolve uric acid and only temporarily address surface colouration. Apply enzyme cleaner to the stained area, leave it for 10 to 15 minutes, blot thoroughly, and follow with baking soda for odour. If the smell returns after drying, it indicates uric acid in the deeper foam layers, which requires professional steam extraction.

Q4. How do you remove blood stains from a mattress?

Use cold water only; never warm or hot, as it sets blood protein permanently. Blot immediately with a cold, damp cloth. For dried blood on light mattresses: apply 3% hydrogen peroxide on a cloth; test on a hidden area first. For any mattress colour: enzyme cleaner works on blood as a protein compound. Rehydrate the dried stain slightly with cool water, apply enzyme cleaner and blot after 10 to 15 minutes.

Q5. Can you soak a mattress when cleaning it?

No. Any liquid reaching the inner foam or coil layers is extremely difficult to dry and creates conditions for mould. Apply all solutions to a cloth rather than spraying the mattress directly where possible. If you need a fine mist on the surface, use the minimum necessary. A damp mattress surface that is properly aired dries within two to four hours. Inner foam saturated with liquid can take days and may never fully dry.

Q6. Is white vinegar safe on mattresses?

Yes. Equal parts white vinegar and cool water applied as a light mist is safe on most mattress fabric types. Vinegar neutralises surface odours and has mild antibacterial properties. It does not disinfect to a clinical standard but is appropriate for general freshening. The vinegar smell dissipates as the mattress dries—typically within one to two hours with good ventilation. Do not use vinegar on silk or extremely delicate mattress fabric without checking manufacturer guidance.

Q7. When should I get my mattress professionally cleaned?

When odour returns within a few days of DIY cleaning, indicating contamination in the deeper foam layers. When the mattress has visible mould, when the mattress is over two years old and has never been professionally cleaned; when someone in the household has allergies or asthma that worsens at night. Professional hot water extraction at 80 to 95 degrees kills dust mites on contact, removes their allergen-producing waste, and extracts contamination from foam layers that household cleaning cannot reach.

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Ms clean Au
Address: 71 Alexandra Street, Prospect, SA-5082
M : 0480 321 027
E-Mail: contact@msclean.au