Most people wash their bedding every week or two without a second thought. Their mattress protector? That tends to sit there quietly, doing its job, until the day they realise it smells a bit off — or they strip the bed and notice a yellowish patch they definitely didn't put there on purpose.
Here's the thing: washing a mattress protector isn't complicated, but washing it wrong can quietly wreck it. The waterproof membrane that stops liquid reaching your mattress is surprisingly easy to destroy with the wrong temperature or the wrong spin speed — and once it's gone, it doesn't come back.
This guide covers everything: how often to wash it, what temperature to use, what absolutely not to do, and how to get yours lasting as long as possible.
How Often Should You Wash a Mattress Protector?
The honest answer is more often than most people do.
Every 2 months is a reasonable minimum for most adults — but certain situations call for more frequent washing:
- Young children or babies: wash monthly, or immediately after any accident
- Pets sleeping on the bed: wash monthly at minimum
- Anyone with allergies or asthma: monthly washing significantly reduces dust mite build-up
- Hot sleepers or anyone who sweats heavily: every 4–6 weeks
- After illness: wash immediately once you're well
Think of it this way — your protector is sitting between your body and your mattress every single night, absorbing sweat, skin cells, and whatever else finds its way into a bed. Regular washing is less about it looking dirty and more about it actually being clean.
What Temperature to Wash a Mattress Protector
This is where most people go wrong.
For most mattress protectors: 40°C or 60°C.
- 40°C is fine for regular maintenance washes when there's no staining or spillage
- 60°C is better if you're washing after illness, or if you have dust mite allergies — it's the temperature that actually kills mites reliably
- Above 60°C: avoid this. High heat is the number one way to damage the waterproof membrane on a waterproof protector
Always check the care label on your specific protector first. But as a rule: hotter isn't better. 60°C is the sweet spot for hygiene without causing damage.
If you have a quilted mattress protector, 40°C is usually ideal — it'll keep the quilting soft and intact without shrinking the filling.
Can You Put a Mattress Protector in the Washing Machine?
Yes — and you should. All protectors from Mattress Protectors UK are machine washable, which is one of the things we specifically look for when selecting products.
A few things to keep in mind:
Use a large drum. A king or super king protector needs space to move around in the wash. Cramming it into a too-small machine means it won't wash properly and may come out with detergent residue. If your home machine feels too small, a launderette with larger drums works well.
Wash it alone or with a few light items. Washing with heavy towels or jeans puts unnecessary stress on the waterproof layer.
Spin speed: keep it gentle. 800–1000 RPM is fine. A high-speed spin can stress the seams and degrade the membrane over time.
Detergent: use a normal amount of liquid or non-bio powder. Avoid fabric softener entirely — it coats the fibres and can reduce the breathability and waterproofing of your protector. No softener. Not even a little.
How to Dry a Mattress Protector
Air drying is best. Hang it over a clothes airer, a banister, or ideally outdoors on a dry day. Make sure it's fully dry before putting it back on the bed — a damp protector is a breeding ground for mould.
Tumble drying: low heat only. Many protectors are tumble dryer safe on a low or cool setting. High heat in a tumble dryer is, again, the fastest way to destroy the waterproof layer. Check your care label — and when in doubt, air dry.
Don't iron a mattress protector. Ever. The heat will melt or warp the waterproof membrane.
How to Remove Stains from a Mattress Protector
Act fast. Fresh stains are always easier to deal with than ones that have dried and set.
For most stains:
- Blot (don't rub) as much of the liquid as possible with a clean cloth
- Rinse with cold water — not hot, which can set protein-based stains like blood or urine
- Apply a small amount of washing up liquid or non-bio detergent to the stain
- Leave for 10–15 minutes, then rinse
- Machine wash as normal
For urine (common if you have young children): Cold water rinse first, then a soak in a solution of water and white vinegar for 30 minutes before washing. It neutralises the odour effectively without damaging the protector. Enzymatic cleaners like Bio-D or similar work well too.
For blood: Always use cold water — hot water sets blood stains permanently. Hydrogen peroxide (3%) dabbed onto the stain can work well on white protectors, but test on a small area first.
If you're regularly dealing with accidents or spills, it's worth looking at a terry towelling mattress protector — the towelling surface is highly absorbent and designed for heavy-duty use, and they tend to be the most robust to repeated intensive washing.
How Long Does a Mattress Protector Last?
A good quality mattress protector, properly washed, will last 2–5 years depending on how often it's used and washed.
Signs it's time to replace yours:
- The waterproof layer crinkles, peels, or has started to let liquid through
- It's developed a smell that washing won't shift
- The fabric has thinned noticeably or developed holes
- It no longer fits your mattress properly (protectors can shrink slightly over time)
When that time comes, replacing it promptly is worth doing — your mattress underneath is what you're protecting, and a good mattress is worth far more than a new protector.
Protect Your Whole Bed, Not Just the Mattress
One thing people often overlook: your pillows need protecting too.
Pillows absorb sweat and skin cells even faster than a mattress does, and pillow cases alone aren't enough to stop this. A waterproof quilted pillow protector goes on under the pillowcase, keeps the pillow itself clean and fresh, and washes exactly the same way as a mattress protector.
It's a small addition that makes a real difference — especially if you're washing bedding regularly for allergy reasons.
Quick Reference: Mattress Protector Washing Guide
| Recommendation | |
|---|---|
| Wash frequency | Every 2 months minimum; monthly for allergies, children, pets |
| Temperature | 40°C regular; 60°C for allergens or after illness |
| Spin speed | 800–1000 RPM |
| Detergent | Normal liquid or non-bio powder |
| Fabric softener | Never |
| Tumble dryer | Low heat only, or air dry |
| Ironing | Never |
Need a New Mattress Protector?
If yours is past its best, we stock a full range of machine-washable mattress protectors in every UK size — single, double, king and super king — with free delivery on every order.
- Waterproof Mattress Protectors — silent, breathable protection from spills and accidents
- Quilted Mattress Protectors — soft quilted finish that adds a layer of comfort
- Mattress Toppers — if your mattress needs more than protecting
- Pillow Protectors — complete the set
All our protectors are selected for washability and durability — because a protector that can't survive regular washing isn't really doing its job.
Mattress Protectors
https://www.mattress-protectors.co.uk/collections/mattress-protectors
Waterproof Mattress Protectors
https://www.mattress-protectors.co.uk/collections/waterproof-mattress-protectors
Mattress Toppers
https://www.mattress-protectors.co.uk/collections/mattress-toppers
Thermal Fleece Under Blanket
https://www.mattress-protectors.co.uk/products/thermal-fleece-underblanket-extra-deep-fitted-warm-under-blanket-protector
Deep Fitted Mattress Protectors
https://www.mattress-protectors.co.uk/blogs/news/deep-fitted-vs-standard-mattress-protectors-uk-sizing-guide-2026
How To Choose The Right Mattress Protector
https://www.mattress-protectors.co.uk/blogs/news/how-to-choose-the-right-mattress-protector-for-your-bed-complete-uk-buying-guide-2026