How Often Should You Wash Your Pillow?
Wash your pillowcase every week, and wash the pillow itself every three to four months — twice a year at the very least — sooner if you have allergies, sweat at night, or share the bed with a pet. Most people skip the pillow for one reason: washing it usually ruins it. Foam crumbles, down clumps, and nothing dries by bedtime. Here's the schedule that actually keeps a pillow clean, which pillows can survive a wash, and how to clean one without wrecking it.
Key takeaways
- Pillowcase: every week.
- Pillow protector (if you use one): every three to four weeks.
- The pillow itself: a deep wash every three to four months — twice a year at minimum.
- Hot water is what clears dust mites — and most pillows can't survive it.
- Memory foam and latex generally can't be machine washed; down, down-alternative, and washable-fiber pillows usually can.
- A pillow built to be washed turns the whole routine into laundry, not a gamble.
How often should you wash each part of your bed?
Each bedding layer sits at a different distance from your skin, so follow this 4-tier wash schedule from weekly pillowcases to quarterly pillow cores:
| What | How often | Why |
|---|---|---|
| Pillowcase | Weekly | It touches your face every night |
| Sheets | Weekly | Sweat, oils, and skin build up fast |
| Pillow protector | Every 3–4 weeks | The barrier that keeps the pillow cleaner |
| The pillow itself | Every 3–4 months (2× a year minimum) | A deep clean for what soaks through |
The Asthma and Allergy Foundation of America recommends washing bedding weekly in hot water — 130°F (54°C) or hotter — to kill dust mites, and replacing a pillow you can't wash about every two years.
Think of it in layers. The pillowcase takes the daily contact, so it gets washed the most. A pillow protector adds a second barrier and only needs attention every few weeks. The pillow itself sits underneath both — but sweat, oil, and skin still work their way down to it over time, which is why it needs a real wash a few times a year, not just a new case on top.
Why a dirty pillow is worth caring about
Every night a pillow quietly collects sweat, body oil, and dead skin. You shed roughly 1.5 grams of skin a day — enough to feed a colony of dust mites. Those mites are common: a national survey found detectable dust-mite allergen in 84% of U.S. beds. One small study even found four to sixteen species of fungus living in used pillows.
For most people this never becomes a crisis. But if you wake up congested, notice more breakouts along your jaw and cheek, or feel your allergies act up in bed, the pillow is one of the first places worth checking. None of this is cause for panic. It's just a good reason to wash on a schedule — and a good reason to own a pillow you actually can.
What temperature actually kills dust mites?
Dust mites die in hot water, roughly 130°F (54°C) and up — which is exactly why allergy experts recommend washing bedding that hot. A cold rinse mostly just moves them around.
The catch: most pillows can't take the heat. Memory foam breaks down, down clumps, and budget synthetic fill flattens for good. So people either wash on cold (which doesn't do much) or stop washing the pillow at all.
This is where a washable pillow changes the math. Pillowash is built in three layers — an outer cover, an inner cover, and the core — and the inner cover and core are made to take a hot, sanitizing wash, not just a gentle cold one. That heat clears out the sweat, skin, and dust mites a cool rinse leaves behind.
Which pillows can you actually wash?
Before you put anything in the machine, it helps to know what you're working with. The fill decides everything — 2 fill types (down and fiber) take a wash easily, others fall apart in the drum.
| Pillow type | Machine washable? | What to do |
|---|---|---|
| Down / feather | Usually yes | Gentle cycle, warm water, dry fully |
| Down alternative / polyester fill | Usually yes | Gentle cycle; can flatten over time |
| Solid memory foam | No | Spot-clean and air out only |
| Latex | No | Spot-clean and air out only |
| Buckwheat | No | Empty the hulls, wash the casing only |
| Washable-fiber (built to be washed) | Yes — by design | Follow the care label; hot wash is the point |
Two patterns stand out. Down and down-alternative pillows can be washed, but every wash wears them down a little and they take a long time to dry. Memory foam and latex mostly can't — the agitation of a machine tears them apart, so the best you can do is spot-clean the surface. That's the quiet trade-off behind a lot of popular pillows: they feel great on night one, but you can never really clean them again.
How to wash a pillow, step by step
If your pillow is machine-washable, follow these 5 steps to clean the fill thoroughly without clumping:
- Read the care label first — it tells you the temperature and cycle.
- Wash two at a time to keep the machine balanced.
- Use a small amount of mild detergent. Skip bleach and fabric softener.
- Run an extra rinse to get all the soap out.
- Dry it completely. A pillow that's even a little damp inside can grow mildew.
If it's memory foam or latex: don't put these in the machine — the agitation tears them apart. Spot-clean stains with a little mild detergent and water, press out the moisture, and let it air-dry fully before it goes back on the bed.
Drying matters as much as washing. Use low heat, add a couple of dryer balls or clean tennis balls to keep the fill from clumping, and give it time — dry it all the way through before it goes back on the bed. Damp fill trapped inside is the single most common reason a freshly washed pillow ends up smelling worse than before. If you're air-drying, lay it flat in a spot with good airflow and turn it a few times.
How do you wash the Pillowash pillow?
Simple: leave the core inside the inner cover and put the 2 layers in the machine together — no taking anything apart.
Wash the outer cover on its own, the way you'd wash a pillowcase. Use a warm wash for everyday cleaning, and save a hotter wash for a deep clean. It dries fast, too, because the core (Breath-Real™) lets air and water pass straight through instead of trapping them — which means less of that "is it dry yet?" guessing that keeps people from washing in the first place.
That's the whole idea: the parts that touch you most are the parts you can clean most, on the schedule above, without babying anything.
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Signs it's time to wash — or replace — your pillow
Don't wait for the 3-month calendar mark if your pillow shows any of these 5 warning signs of sweat buildup or structural fatigue:
- Yellow stains that won't come out
- A smell that lingers even after airing it out
- More breakouts, or stuffier mornings
- It's gone flat and stopped supporting your neck
With most pillows, several of these at once mean it's time to buy a new one — the fold-it-in-half test is the classic check: fold the pillow and if it stays folded instead of springing back, the support is gone. With a washable pillow, the first three usually just mean it's time for a wash, and only the last one means it's completely worn out.
Not sure where your pillow stands?
Take our 30-second Pillow Health Check to find out whether yours needs a wash, a deep clean, or a replacement.
Frequently asked questions
Can you put a pillow in the washing machine?
It depends on the fill. Most washable-fiber and down pillows can go in on a gentle cycle; memory foam and latex generally can't. Always check the care label first.
What happens if you never wash your pillow?
It keeps building up sweat, oils, dead skin, dust mites, and sometimes fungus — which can make allergies, asthma, and skin breakouts worse over time. Washing on a regular schedule clears most of that out.
Does washing actually get rid of dust mites?
A hot enough wash does — around 130°F (54°C) and up. A cold wash mostly rinses the surface. That's why the temperature your pillow can handle matters so much.
Can you get rid of dust mites without washing the pillow?
Up to a point. A hot tumble dry — about 20 minutes on the highest heat — kills dust mites on pillows that can take the heat, even between washes. The catch is that memory foam and latex tolerate high heat about as poorly as a hot wash, so for those, spot-cleaning and airing out are about all you can safely do.
How do you dry a pillow so it doesn't grow mold?
Dry it fully on low heat with dryer balls to fluff the fill, and don't rush it back onto the bed. Trapped moisture inside is what leads to mildew.
How often should you replace your pillow?
Allergy experts suggest replacing a pillow you can't wash about every two years. One you can wash lasts as long as it holds its shape and support — washing keeps it clean in between, so age, not buildup, becomes the deciding factor.
Does washing shorten a pillow's life?
For most pillows, yes — every wash wears them down, which is why the care tag warns against it. A pillow designed to be washed is the exception: washing it is the point, not the risk.
By Maya Ellis · Pillowash · Last updated June 2026
Maya writes about sleep hygiene and bedding care for Pillowash — the team behind the washable Pillowash Crisp pillow. Every cleaning tip here is one we follow ourselves.
Sources: Asthma and Allergy Foundation of America; American Lung Association; Arbes et al., Journal of Allergy and Clinical Immunology (2003); Woodcock et al., Allergy (2006).
For a full, type-by-type walkthrough, see our complete guide to washing any pillow.