How to Clean a Mattress: Step-by-Step Guide

Quick Answer: To clean a mattress, strip off all the bedding, vacuum the surface thoroughly, spot-clean any stains, sprinkle baking soda over it to freshen it up, then let the mattress air-dry completely before remaking the bed.

Your mattress gets used every night, but it is probably not something you think about cleaning very often. Sheets go in the wash, pillowcases are changed, and duvets get aired, while the mattress underneath is usually left to get on with things.

Over time, though, mattresses naturally collect dust, dead skin cells, sweat, body oils, pet hair and the occasional spill. That does not mean your mattress is particularly dirty. It simply means that, like most things around the home, it benefits from a proper refresh every now and then. The good news is that cleaning a mattress is surprisingly straightforward. You do not need specialist equipment or an entire cupboard of cleaning products. In fact, especially with memory foam, a gentler approach is usually best.

Why Regular Mattress Cleaning Matters

Regularly cleaning your mattress can make the whole bed feel fresher. Even if you change your bedding frequently, small amounts of dust, skin, moisture and everyday debris can still work their way through to the mattress surface. Vacuuming lifts that build-up away, and dealing with stains when they happen can stop them from becoming much harder to remove later.

It also gives you a useful opportunity to actually look at the mattress. You might notice a forgotten mark beneath the protector, an area that could benefit from rotation, or simply realise it’s been much longer than you thought since its last clean. If you sleep with pets, eat or drink in bed or tend to sweat heavily during the night, keeping on top of cleaning becomes even more worthwhile.

What You'll Need

You can clean most mattresses with a few basic things you may already have at home.

Item	What you'll use it for
Vacuum cleaner with upholstery attachment	Removing dust, hair and loose debris
Clean white or microfibre cloths	Blotting stains without transferring colour
Mild laundry detergent	Making a gentle spot-cleaning solution
Baking soda	Freshening the mattress and absorbing lingering smells
Small bowl or spray bottle	Mixing or lightly applying cleaning solution
Cool or lukewarm water	Diluting detergent and treating marks
Mattress protector	Helping keep the mattress cleaner afterwards

 

Try not to reach straight for strong household cleaners. Mattress materials can be sensitive to chemicals and moisture, and memory foam in particular does not respond well to being soaked.

How Often Should You Clean Your Mattress?

For most households, a thorough clean every few months is plenty. That does not mean you need to deep clean it every time you change your sheets. A quick vacuum from time to time will help keep dust and debris under control, while you should tackle spills as soon as possible rather than waiting for your next planned clean. It can be helpful to build mattress cleaning into your normal care routine. If you already rotate your mattress every few months, use that as a reminder to vacuum it and check for any marks that need attention.

How to Clean a Memory Foam Mattress Step by Step

Memory foam needs a little more care than some other mattress materials because it can hold onto moisture. The aim is to clean the surface properly without soaking the foam underneath.

Step 1: Strip and Vacuum

Start by removing everything from the bed, including your sheets and mattress protector. Wash any removable bedding according to the care label instructions.

With the mattress bare, vacuum the entire surface using an upholstery attachment. Take your time rather than rushing. Dust and hair often gather around seams, stitching and edges, so give these areas some extra attention. If practical, vacuum the sides of the mattress too. You do not need to press down hard. Slow, overlapping passes are enough to collect loose debris without putting unnecessary pressure on the surface.

Step 2: Spot Clean Stains

Once the dust is gone, turn your attention to any visible stains.

For most everyday marks, mix a small amount of mild laundry detergent with cool or lukewarm water. Dip a clean cloth into the solution, wring it out well and gently blot the stained area. The important word here is blot. Scrubbing can spread a stain or work it further into the fabric, while pouring cleaning solution directly onto the mattress introduces far more moisture than you need. Work from the outside of the stain towards the middle. Once you have lifted as much as possible, lightly blot the area with another cloth dampened with clean water to remove any detergent residue.

Step 3: Deodorise with Baking Soda

If the mattress looks clean but doesn't smell as fresh as you would like, baking soda can help. Sprinkle a light, even layer across the surface and leave it there for a few hours. If you can leave it longer, even better. This gives the baking soda time to absorb lingering odours and a little surface moisture. Once it has done its job, vacuum the mattress again, working slowly enough to collect all the powder from the surface, seams and edges.

Step 4: Let It Air Dry Fully

Do not rush this bit. Even if you have been careful with water, the mattress needs to be completely dry before you put your protector and bedding back on. Covering a damp mattress can trap moisture inside, leading to stale smells and creating exactly the sort of environment you are trying to avoid.

If possible, clean your mattress earlier in the day, open the windows, and let plenty of fresh air circulate around the room. Avoid using intense direct heat to speed things up. Natural airflow and a little patience are the safer options.

Step 5: Rotate Your Mattress

Once the mattress is clean and completely dry, it is the ideal time to rotate it if the manufacturer's care instructions recommend doing so.

Rotation can help spread wear more evenly across the sleeping surface rather than putting pressure on exactly the same areas night after night. True Rest mattresses are designed to be used one way up, so rotate end to end rather than flipping. Using a protector and following the rotation guidance also keeps you within the terms of your True Rest warranty.

Can You Steam Clean a Memory Foam Mattress?

Steam cleaning might seem like an extra-deep clean, but it is generally not recommended for memory foam. The biggest issue is moisture. Steam can introduce water deep into the foam, where it may take a surprisingly long time to dry. If moisture remains trapped inside the mattress, it can cause unpleasant smells and potentially encourage mould or mildew to develop.

Heat may also affect some mattress materials, depending on how the mattress is constructed. For memory foam, vacuuming and careful spot cleaning are generally the safer options. Always check the manufacturer's care instructions before using a steam cleaner, carpet cleaner or similar machine.

What to Avoid When Cleaning Your Mattress

More cleaning product does not necessarily mean a cleaner mattress. One of the biggest things to avoid is soaking it. Whether you use water, detergent, or another cleaning solution, keep moisture to a minimum.

Also avoid harsh scrubbing, bleach, and strong cleaning chemicals unless the manufacturer specifically says they are safe. These can discolour the cover, leave residues behind or damage the materials underneath. Don't put your bedding back on while the mattress is still damp. For mattresses, gentle cleaning and plenty of drying time will usually get you much further than an aggressive approach.

How to Remove Common Stains

The sooner you deal with a mattress stain, the easier it will usually be to lift. For a fresh drink spill, press a clean, dry towel onto the area to absorb as much liquid as possible. Do not rub it around. Once you've lifted the excess, gently blot the remaining mark with a small amount of diluted mild detergent.

You can tackle sweat marks and general discolouration much the same way. Several light treatments are better than soaking the area all at once. For urine, absorb as much moisture as you can first, then carefully clean the affected area with a suitable mild solution. Once the mattress is dry, baking soda can help absorb any lingering odour.

Treat blood stains with cold water rather than hot, as heat can make protein-based stains harder to remove. Whatever the stain, the principle stays the same: blot, use as little liquid as possible and give the mattress plenty of time to dry.

Protecting Your Mattress Going Forward

Cleaning a mattress is much easier when there’s less to clean in the first place, which is where a mattress protector earns its keep. A good protector creates an extra barrier between your bedding and the mattress, helping shield the surface from sweat, body oils, dust and accidental spills. When it needs freshening up, you can usually remove the protector and wash it rather than having to tackle the mattress itself.

Using a suitable protector may also be important for your warranty. Some warranties include conditions relating to stains, accidental damage or mattress protection, so it is worth checking the terms that apply to yours. Also, change your bedding regularly, deal with spills when they happen, and follow the recommended rotation schedule.

They are all small habits, but together they make looking after your mattress much easier.

Conclusion

Knowing how to clean a mattress is really about keeping things simple. Vacuum it regularly, deal with marks before they set, keep moisture to a minimum, use baking soda when it needs freshening up, and always allow the mattress to dry fully before making the bed again.

For memory foam in particular, be cautious with water. A gentle surface clean is far better than soaking the foam or reaching for a steam cleaner. Combine that with a washable mattress protector and the correct rotation routine, and you have a straightforward way to keep your mattress feeling fresher and properly cared for.

Frequently Asked Questions (FAQs)

Can I wash my mattress cover in a washing machine?

Possibly, but always check the care label first.

Some mattresses have removable covers that are designed to be washed, while others have covers that should stay in place. A zipper doesn't automatically mean the cover can go in the washing machine. If it is washable, follow the recommended temperature and drying instructions carefully.

How do I get rid of mattress smells?

Start by vacuuming the mattress thoroughly, then sprinkle baking soda across the surface and leave it for several hours before vacuuming it away.

Fresh air helps too, so open a window if the weather allows and let the mattress breathe. If the smell comes from a particular spill or stain, address the cause first rather than trying to cover it up.

Can I clean my mattress with vinegar?

White vinegar is commonly suggested as a household cleaner, but that does not mean it is suitable for every mattress.

If you have memory foam, use any liquid very sparingly. Too much vinegar solution can soak into the foam just as easily as plain water. Check your manufacturer's cleaning guidance first and test any solution on a small, less visible area before using it more widely.

How do I know if my mattress needs replacing?

Cleaning can make a mattress feel fresher, but it cannot repair one that has lost its support.

Significant sagging, permanent dips, damaged foam, broken springs or a noticeable reduction in comfort can all be signs that replacement is worth considering. If you regularly wake up feeling uncomfortable and the mattress no longer seems to support you properly, that is another good reason to take a closer look at its condition.

Does cleaning affect my warranty?

Normal mattress cleaning should not affect your warranty as long as you follow the manufacturer's care instructions.

Issues can arise if the mattress is damaged through excessive moisture, unsuitable cleaning products or methods the manufacturer specifically advises against. Warranty conditions may also cover things such as staining, using a mattress protector, and regular rotation. Before trying any intensive cleaning method, check the warranty and care guidance for your individual mattress so you know exactly what is required.