In a Nutshell
Knowing how to wash pillows correctly can help keep them fresh, supportive, and free from sweat, oils, dust, and allergens. Most pillows can be machine washed, but the exact method depends heavily on what is inside them. Down and synthetic pillows generally do well in a washing machine, foam pillows should almost never go in one, and a few materials need hand washing or special care to avoid clumping, damage, or losing their shape.
The biggest mistake people make is not skipping washing altogether, but using the wrong method for their specific pillow type, which can ruin a pillow that would have otherwise held up fine.
Find Your Pillow Type
| Pillow Fill Type | Washing Method |
| Polyester / synthetic fiberfill | Machine washable, gentle cycle |
| Down or down-feather blend | Machine washable with care, low heat dry |
| Memory foam | Spot clean only, never machine wash or dry |
| Latex foam | Spot clean only, occasional hand wash of removable cover |
| Buckwheat hull | Do not wash the fill; wash the cover only |
The Basics, Before You Start
- Always check the care label first; it overrides general advice when there’s a conflict.
- Foam pillows (memory foam and latex) should never go in a washing machine.
- Washing two pillows together helps balance the washer drum and improves cleaning.
- Pillows need to be completely dry before use to prevent mold or mildew growth.
- Most pillows benefit from a wash every 4 to 6 months, even with a pillowcase.
Why Washing Pillows Matters More Than People Think
What Actually Builds Up Inside a Pillow
Even with a pillowcase, pillows gradually absorb sweat, body oils, dead skin cells, and drool over time, which can lead to dust mites, odor, and yellowing, particularly along the areas closest to your face and neck.
Health-Related Reasons to Wash Regularly
Dust mites, which feed on dead skin cells, are a common allergy and asthma trigger, and pillows are one of their preferred environments due to warmth and moisture from regular use.
Why People Often Skip This Chore
Pillows are bulky and awkward to wash compared to sheets or pillowcases, and uncertainty about whether a specific pillow type is even washable keeps a lot of people from attempting it at all.
How to Machine Wash Polyester or Down Pillows
- Check for Tears — Repair any small holes in the fabric shell before washing to prevent fill from leaking out.
- Wash Two at a Time — This balances the washing machine and helps pillows clean and rinse more evenly.
- Use a Gentle Cycle With Warm Water — Hot water can damage down clusters and shrink synthetic fill.
- Add a Small Amount of Mild Detergent — Avoid fabric softener, which can coat and clump the fill.
- Run an Extra Rinse Cycle — This helps remove all detergent residue, which can otherwise irritate skin.
- Dry on Low Heat With Dryer Balls — Tennis balls or wool dryer balls help break up clumps as the pillow dries.
- Check for Complete Dryness — Run multiple low-heat cycles if needed; a damp pillow center can lead to mildew.
How to Care for Memory Foam Pillows
Memory foam should never be machine washed or dried, since water exposure and agitation can break down the foam structure and significantly shorten the pillow’s lifespan. Instead, remove and wash the cover separately according to its care label, and spot clean the foam itself with a damp cloth and a small amount of mild detergent, then air dry completely before replacing the cover.
Never put memory foam in a dryer. Heat can cause the foam to break down, become brittle, or even pose a fire risk in some cases.
How to Care for Latex Foam Pillows
Similar to memory foam, latex pillows should not be machine washed. Remove and wash any cover separately, and spot clean the latex itself with a damp cloth and mild soap if needed. Latex can also be gently hand washed in a basin with lukewarm water and mild detergent, then pressed (not wrung) to remove excess water and air dried thoroughly.
How to Care for Buckwheat Hull Pillows
The buckwheat hulls themselves should never be washed, since water will cause them to swell, mold, or break down. Instead, remove the hulls and wash only the outer pillow cover, or occasionally air out the hulls in indirect sunlight to reduce odor and moisture.
Signs Your Pillow May Need Replacing Instead of Washing
- Persistent yellowing that doesn’t improve after washing
- A lumpy or flattened feel that doesn’t restore after fluffing
- A musty smell that returns shortly after drying
- Visible tears or significant fill loss
- A pillow that’s more than 1 to 2 years old (for budget pillows) and showing wear
What Happens If You Skip Washing Pillows for Too Long
Short Term
Body oils and sweat accumulate gradually, often without an obvious smell or visible change at first.
Over Several Months
Dust mites and their waste products build up, which can worsen allergy or asthma symptoms for sensitive individuals, even if the pillow looks clean.
Over a Year or More
Yellowing, odor, and a noticeable loss of pillow loft or support are common, along with a higher chance of mold or mildew if the pillow was ever stored or used while damp.
Who Should Wash Pillows More Frequently
- People with allergies or asthma, who may benefit from washing every 2 to 3 months
- Those who sweat heavily at night or sleep without air conditioning in hot climates
- People who eat or drink in bed
- Pet owners whose pets sleep on the bed
- Anyone recovering from a cold, flu, or skin infection
Helpful Tools and Tips for the Process
| Helpful | Better Avoided |
| Mild, residue-free detergent | Fabric softener (clumps fill) |
| Wool or rubber dryer balls | High heat drying for down or memory foam |
| Low or no-heat drying for delicate fills | Skipping the extra rinse cycle |
| Sunlight for airing out odors | Storing pillows while still slightly damp |
Washing Pillows vs Washing a Pillow Protector
| Feature | Washing the Pillow Itself | Washing a Pillow Protector |
| Frequency | Every 4 to 6 months | Every 1 to 2 weeks, alongside sheets |
| Effort | More involved, depends on fill type | Quick and simple, like washing a pillowcase |
| Main benefit | Removes deep buildup from the fill itself | Prevents buildup from reaching the pillow at all |
| Best approach | Use both together for the cleanest result | Use both together for the cleanest result |
Clearing Up Common Confusion
| Misconception | Reality |
| A pillowcase means you never need to wash the pillow | Oils, sweat, and dust mites still pass through and accumulate over time |
| All pillows can go in the washing machine | Foam pillows should never be machine washed |
| Hot water cleans pillows better | Hot water can damage down and shrink certain synthetic fills |
| A musty smell after washing means the pillow is ruined | It often just means the pillow wasn’t fully dried and needs another drying cycle |
What Cleaning and Allergy Experts Recommend
The American College of Allergy, Asthma and Immunology notes that regularly washing bedding, including pillows, can help reduce dust mite exposure for people with allergies or asthma. Textile care guidance from major appliance and bedding manufacturers consistently recommends checking individual care labels, since fill type significantly affects which washing method is safe.
When to Get Professional Cleaning Help
Consider professional cleaning for large body pillows or specialty pillows that don’t fit well in a home washing machine, for pillows with persistent odor or staining that doesn’t improve after a standard wash, or if you’re dealing with mold growth, which may require more thorough treatment than a typical home wash cycle.
Keeping Pillows Cleaner for Longer
- Use a zippered pillow protector underneath your pillowcase
- Avoid eating or drinking in bed when possible
- Let pillows air out in sunlight occasionally to reduce moisture and odor
- Wash pillowcases weekly along with sheets
- Replace pillows on a reasonable schedule based on material and visible wear
To Sum It Up
Most pillows can be cleaned at home, but the right method depends entirely on what’s inside. Polyester and down pillows generally handle a gentle machine wash and low-heat dry well, while foam and buckwheat pillows need spot cleaning or cover-only washing instead. Checking your pillow’s care label and matching the method to the fill type is the easiest way to keep pillows clean without damaging them.
Frequently Asked Questions
How often should you wash pillows?
Most pillows benefit from a deep wash every 4 to 6 months, even with a pillowcase and protector in regular use.
Can all pillows go in the dryer?
No. Foam pillows should never go in a dryer, and even washable pillows generally do best on low or no-heat settings.
Why do my pillows turn yellow over time?
Yellowing usually comes from a combination of sweat, body oils, and moisture absorbed over time, which is why regular washing helps slow the process.
Is it safe to wash a pillow with a zipper closure?
Yes, as long as the fill type is machine washable; just make sure the zipper is fully closed before washing to prevent snagging.
Can I wash a feather pillow the same way as a down pillow?
Generally yes, feather and down pillows can usually follow the same gentle wash and low-heat dry process, though always check the care label first.
What detergent is best for washing pillows?
A mild, dye-free, residue-free detergent works best, since it’s less likely to leave irritating residue or clump delicate fill materials.
How do I know if my pillow is completely dry?
Squeeze the center of the pillow firmly; if it feels at all damp or you notice any musty smell, continue drying on low heat before storing or using it.
Can washing pillows help with allergies?
Yes, regular washing reduces dust mite buildup, which is a common allergy and asthma trigger found in bedding.