These 5 habits are making your mattress dirty — here's why and how to stop

A woman sat on bed wearing white vest and orange shorts with a glass of water in hand, looking out of window with wooden frame and plants outside.
(Image credit: Getty Images)

When it comes to a good night's sleep, a clean mattress is essential. But many of us are unknowingly making our mattresses dirty. From a late night snack to a quick cuddle with your pets, these seemingly innocent habits transform your bedroom sanctuary into an unhealthy space. And that could be harming your sleep quality.

Investing in the best mattress for you is vital for your sleep quality, but once you have that mattress, maintaining cleanliness is equally as important. A dirty mattress doesn’t just look bad, it can also be a breeding ground for skin irritations, allergies and respiratory issues.

But the good news is that just a few routine switches can turn things around. Here we'll share with you what little habits could cause your mattress to be dirty and simple changes to keep your sleep space clean and hygienic.

5 habits that are making your mattress dirty

1. Eating in Bed

Partial to a midnight snack? You might want to rethink your mattress meals. Snacking in bed is one of the quickest ways to compromise your mattress’s cleanliness. No matter how careful you are, wayward crumbs can find their way into your sheets and, eventually, onto your mattress. As well as feeling uncomfortable to sleep on, these crumbs can lead to bacterial growth — and even attract insects.

A woman lies on her bed beneath a duvet eating from a bowl of chips

(Image credit: Getty Images)

The same goes for drinks. As cozy as it is to curl up with a Sunday morning coffee in bed, liquid spills spell disaster for your mattress. The best mattresses in a box feature multiple layers of materials, and a liquid spill can seep deep into every one of them. This can result in stains, unpleasant smells and potentially mattress mold

2. Wearing dirty socks to bed

While wearing socks to bed can be beneficial for your sleep, wearing the same socks you’ve had on all day is a huge no-no. Throughout the day your socks gather dirt, sweat and bacteria (even if you’ve had your shoes on.) By getting in to bed with the same socks you’ll be transferring all these contaminants to your sheets and mattress.

And wearing the same socks to bed is also pretty bad news for your feet. The bacteria and moisture trapped in your dirty socks can create the perfect environment for fungal infections, such as athlete's foot. 

3. Using your phone in bed

We're all guilty of scrolling when we should be concentrating on getting some shut-eye, but did you know using your phone in bed isn't just damaging your sleep — it's also bad news for your mattress. Research shows your smartphone can be one of the dirtiest items in your home, harboring high levels of bacteria including harmful pathogens.

Bringing your phone to bed transfers that bacteria into your sleep space. Your phone also collects oils from your hands and face which can transfer to your bedding, leading to mattress stains and smells.

4. Letting your pets join you

While we all love a sleepy cuddle with our pets, letting your pooch into your bed isn't ideal when it comes to maintaining good mattress hygiene. Outdoor elements such as dirt, pollen and even urine and feces cling to fur and paws, which then transfers to your mattress.

A dog sits on an Alaskan king mattress in a bedroom

(Image credit: Future)

Pet dander can also cause problems, potentially heightening allergies and respiratory issues. Finally, even a well-groomed pet might harbor fleas and mites. These little hitchhikers work into your mattress and can be difficult to remove once established.

5. Sleeping with wet hair

If you wash your hair in the evening, make sure to you give yourself a proper blow-dry before your head hits the pillow. Sleeping with wet hair may seem harmless, but it can significantly impact your mattress hygiene. The moisture from wet hair seeps into your pillow and, eventually, your mattress. This dark, damp environment is ideal for mold and mildew, which can result in stains, foul smells and potentially even health issues.

Excess moisture can further damage your mattress by causing the materials to break down quicker. Moisture can be a particular problem for foam — you shouldn't get a memory foam mattress wet — but even the best hybrid mattresses start to deteriorate if exposed to damp.

5 ways to keep your mattress cleaner

1. Keep your mattress for relaxing only

Keeping your mattress as a dedicated sleep space is an easy way to keep your mattress clean. When your bed is reserved for rest, you reduce the amount of dirt and debris that comes in contact with your mattress.

And this can also improve your sleep quality. When you only use your mattress for sleeping, you train your brain to recognize that going to bed means going to sleep. Be sure to create relaxing spaces elsewhere in your home, so you aren't tempted to crawl into bed the next time you load Netflix.

2. Clean any spills straight away

Life happens, and that means spills and accidents. But it’s not the end of the world, as long as you take quick action. Liquid can seep deep in to the mattress layers, where it becomes embedded and tough to remove. This can be a particular problem with the best memory foam mattresses, which feature multiple layers of dense foam.

A person wearing rubber gloves uses a spray bottle and a clean cloth to clean the surface of the Emma Elite mattress.

(Image credit: Future)

If any spills happen, use a clean, absorbent cloth to blot the area and remove excess moisture. Keep working the area until your cloth is no longer picking up damp. Always ensure that your mattress is fully dry before you put any sheets back on the bed, to avoid the growth of mold and mildew. 

3. Regularly air your mattress

If you want to keep your bed in great condition then it’s crucial to allow your mattress to breathe. All mattresses benefit from airing and it’s something that should be worked into a regular mattress maintenance routine. Letting your mattress breathe improves airflow, helping moisture, bacteria, and dust to dissipate.

To air a mattress, all you need to do is remove the bedding, vacuum the surface of the mattress, then open up the windows and let the air circulate. If possible, prop the mattress against a wall which will ensure all sides of the mattress have some breathing space. This simple act can greatly help extend the lifespan of your mattress

4. Only wear clean pajamas and socks to bed

There's nothing more satisfying than slipping into bed wearing a clean pair of PJs. And it doesn’t just feel good: it can also help keep your bed clean. Wearing pajamas for numerous nights, or sitting on the bed with outside clothes, can transfer dirt, sweat and environmental pollutants to your mattress.

A woman wearing blue and white stripy pyjamas lays on her side on the Helix Midnight Luxe mattress

(Image credit: Future)

Also, while it can be hard to find the motivation to get dressed after a relaxing shower, avoid sitting on your bed in a damp towel. This can introduce unwanted moisture to your mattress.

5. Ditch your pre-sleep scroll

Breaking the habit of using your phone in bed keeps the bacteria-laden devices away from your mattress and helps you develop a healthy and relaxing bedtime routine. If you're looking for new ways to relax before sleep, try reading a book or partaking in some guided meditation for sleep. Not only will your mattress be cleaner, but your mind will feel cleaner too.  

Rachael Penn
Contributor

Rachael is a freelance journalist based in South Wales who writes about lifestyle, travel, home and technology. She also reviews a variety of products for various publications including Tom’s Guide, CreativeBloq, IdealHome and Woman&Home. When she’s not writing and reviewing products she can be found walking her Sealyham and West Highland terrier dogs or catching up on some cringe-worthy reality tv. 

Read more
Image shows a person in blue disposable gloves pointing to bed bugs on a mattress
You might be creating the perfect conditions for bed bugs to thrive in your mattress — here's why
A woman scrubbing the surface of a mattress with a blue sponge with a Sleep Week 2025 logo in the corner
5 DIY mattress cleaning jobs you should do now — avoid mold, bed bugs, allergies, and dust mites
A woman cleaning up a spill on a mattress
I’m a mattress cleaning expert — this is when you should rotate, vacuum and deep clean your bed in 2025
An unmade bed with a white duvet bunched up and white pillows, mattress shows slight body impressions
7 signs that you have dust mites in your mattress — and why that's bad for your sleep
A a person uses steam cleaning on a mattress to keep it fresher for longer
Why you should always deep clean your mattress after your holiday guests leave
Bed linens crumpled on a white mattress
How to get rid of dust mites from your mattress, pillows and bedding
Latest in Mattress Care
A woman's hand holding a magnifying glass magnifying bed bugs on a mattress
How to get rid of bed bugs naturally with the $6 household staple you might already own
A woman scrubbing the surface of a mattress with a blue sponge with a Sleep Week 2025 logo in the corner
I’m a mattress cleaning expert — the 5 products I swear by for getting rid of urine, stains, smells and bed bugs
Rubber gloves hands holding a spray bottle and cleaning brush over white mattress surface
3 tricks professional mattress cleaners swear by for getting rid of urine and sweat stains
The image shows a glass bowl, a tube of toothpaste, a bottle of liquid laundry detergent and a jar of baking soda on a wooden table
I tried the viral toothpaste and warm iron DIY mattress cleaning hack for brown stains — these are my results
Koitat mattress steam cleaner on white mattress with steam coming out
I tried a mattress cleaning machine that uses steam to 'kill' bed bugs and dust mites — and I was impressed
A woman scrubbing the surface of a mattress with a blue sponge with a Sleep Week 2025 logo in the corner
5 DIY mattress cleaning jobs you should do now — avoid mold, bed bugs, allergies, and dust mites
Latest in Features
2025 Mini Cooper Countryman SE All4 review.
I drove the Mini Cooper Countryman EV for a week — and it’s the most thrilling ride I’ve tested this year
Troubadour Apex 3.0 Backpack
I tested this laptop backpack for 6 months — and it’s one of the best purchases I’ve ever made
Galaxy S25 Ultra next to macro shot of flower
I test camera phones for a living — here's 3 tips for taking great macro shots
A man filing his taxes electronically on a laptop
AI-powered tax scams are here - how to stay safe from deepfakes, phishing and more this tax season
Roon
Forget Spotify HiFi — I made a hi-res streaming service that's just for me
Soundcore AeroClip open-ear earbuds in champagne mist against a blue backdrop
I ditched my AirPods for these budget open-ear earbuds while running for a week — I won’t be going back