How to Wash and Maintain Every Type of Pillow

Pillows accumulate body oil, sweat, dead skin cells, saliva, and dust mites at a rate that most people would prefer not to think about. Within two years, a pillow that has never been washed may derive 10 percent of its weight from dust mites and their waste products, according to a frequently cited (and somewhat alarming) estimate from the University of Manchester. Whether that figure is precisely accurate or somewhat inflated, the underlying point is valid: pillows are a hygiene challenge that most households underaddress.

The reluctance to wash pillows is understandable. They are bulky, they take forever to dry, and the fear of ruining an expensive pillow keeps many people from even attempting it. But most pillows can be washed safely if you match the method to the material. The following guide covers every common pillow type, from down to buckwheat, with specific instructions that protect the fill while actually getting the pillow clean.

How Often Should You Wash Pillows?

The general recommendation is every three to six months, depending on your personal factors. Wash more frequently (every two to three months) if you sweat heavily during sleep, sleep without a pillowcase, have allergies or asthma, or use products (hair oil, night cream) that transfer to the pillow. Wash less frequently (every six months) if you use a pillow protector between the pillow and pillowcase, which acts as a second barrier against moisture and oils.

Between washes, air your pillows regularly. Once a month, remove the pillowcase and protector and place the pillow in direct sunlight for two to three hours. UV light kills dust mites and bacteria, and the heat drives out moisture. If direct sunlight is not available, tumble the pillow in a dryer on the air-only or low-heat setting for 20 minutes to fluff the fill and remove surface moisture.

Down and Feather Pillows

Down and feather pillows are among the most washable pillow types, which surprises many people. Waterfowl down is naturally water-resistant (it evolved to keep birds warm and dry), and it cleans up well in a washing machine with proper technique.

Washing Method

1. Machine wash two pillows at once to balance the load. Use a front-loading machine if available; top-loading machines with center agitators can damage the delicate fill. If you must use a top-loader with an agitator, place the pillows vertically around the agitator, not flat on top of it.
2. Use warm water and a gentle cycle. Hot water can strip natural oils from the down, making it brittle. Cold water does not clean effectively. Warm (not hot) is the sweet spot.
3. Use a small amount of gentle liquid detergent. Avoid powder detergent (it can clump in the down), bleach (damages down fibers), and fabric softener (coats the down and reduces loft). A down-specific wash (like Nikwax Down Wash or Grangers Down Wash) is ideal but not required. A gentle, fragrance-free liquid detergent works fine.
4. Run an extra rinse cycle. Down traps soap easily, and residual detergent prevents the down from lofting properly after drying. The extra rinse is not optional.

Drying Method

1. Tumble dry on low heat. This is the critical step. Down pillows must be dried completely, and the drying process takes two to four hours. Residual moisture trapped in the down clusters will cause mildew and a sour odor that is extremely difficult to remove.
2. Add two to three clean tennis balls or dryer balls. These break up clumps of wet down as the pillow tumbles, ensuring even drying and restoring loft. Without them, the down will dry in dense, flattened clumps.
3. Check every 30 minutes. Remove the pillow, fluff it by hand, break apart any remaining clumps, and return it to the dryer. The pillow is done when it feels uniformly light and fluffy with no cool, damp spots in the center.
4. Do not air dry. Air drying takes too long for down pillows (24 to 48 hours or more in most conditions), during which mildew can develop in the wet interior. Machine drying on low heat is the only reliable method.

Memory Foam Pillows

Memory foam pillows cannot be machine washed. Water saturates the foam's cell structure, and the weight of wet memory foam can tear the material apart in a washing machine. Machine drying is equally damaging: the heat degrades the viscoelastic properties of the foam.

Washing Method

1. Spot clean with a damp cloth. For localized stains, mix a small amount of gentle liquid detergent with warm water, dip a clean cloth in the solution, and blot (do not rub) the stain. Follow with a cloth dampened in plain water to remove detergent residue.
2. For a deeper clean, hand wash. Fill a bathtub or large basin with lukewarm water and a tablespoon of gentle liquid detergent. Submerge the pillow and gently squeeze (do not wring or twist) the foam to work the soapy water through it. Drain the soapy water, refill with clean water, and squeeze again to rinse. Repeat the rinse until no soap remains.
3. Press out excess water. Lay the pillow flat on a clean, dry towel. Roll the towel around the pillow and press firmly to absorb water. Unroll, flip the pillow, and repeat with a dry towel. The goal is to remove as much water as possible before air drying.

Drying Method

1. Air dry completely. Place the pillow flat in a well-ventilated area, ideally in sunlight. Flip every two to three hours. Drying takes 24 to 48 hours depending on humidity and airflow. The pillow must be completely dry before use. If any moisture remains, mildew will develop inside the foam.
2. Do not machine dry. Even on low heat, dryer temperatures can damage memory foam.

Latex Pillows

Latex pillows share memory foam's water sensitivity but are slightly more resilient. Solid latex (Dunlop or Talalay) should not be machine washed. Shredded latex pillows are somewhat more tolerant of water exposure because the small pieces dry faster.

Washing Method

For solid latex: spot clean only, using the same method as memory foam. For shredded latex: hand wash in a bathtub with gentle detergent, squeezing gently. Shredded latex can tolerate more handling than solid latex without tearing.

Drying Method

Air dry in a well-ventilated area. Do not expose latex to direct sunlight for extended periods, as UV light degrades latex over time (unlike down and synthetic fills, which benefit from UV exposure). A shaded outdoor area with good airflow is ideal. Latex should never be machine dried.

Polyester Fill Pillows

Polyester fill (also called poly-fill, fiberfill, or synthetic fill) is the most forgiving pillow material for washing. These pillows can be machine washed and machine dried with minimal risk of damage.

Washing Method

1. Machine wash on warm, gentle cycle. Wash two pillows together for load balance. Use liquid detergent. Bleach is acceptable for white polyester fills if needed for stain removal, though it is not necessary for routine cleaning.
2. Extra rinse cycle recommended to ensure all detergent is removed.

Drying Method

1. Tumble dry on low to medium heat. Add dryer balls to prevent clumping. Check every 20 minutes and fluff by hand. Drying typically takes one to two hours.
2. Warning: Polyester fill compresses with each wash-dry cycle. After three to five washes, you may notice the pillow has lost significant loft and no longer supports your head adequately. This is normal and indicates the pillow is approaching the end of its useful life.

Buckwheat Pillows

Buckwheat hull pillows cannot be washed conventionally. The hulls absorb water, swell, and will not dry properly in the pillow, leading to mold. However, the outer casing can be washed, and the hulls themselves can be refreshed.

Method

1. Empty the hulls into a large bowl or clean trash bag.
2. Wash the casing in the washing machine on warm, gentle cycle. Dry on low heat or line dry.
3. Spread the hulls in a thin layer on a baking sheet or clean towel in direct sunlight for two to three hours. This kills dust mites and bacteria and refreshes the hulls. If hulls have developed an odor, baking them in a low oven (200 degrees Fahrenheit for 20 minutes) can help, though this is rarely necessary.
4. Refill the casing. This is also an opportunity to add fresh hulls if the pillow has lost volume.

When to Replace Instead of Wash

Washing extends a pillow's life, but every pillow has a finite lifespan. Replace your pillow when:

• The fold test fails: Fold the pillow in half and release. A healthy pillow springs back to flat. A pillow that stays folded has lost its supportive structure.
• Permanent odor persists after washing. If a properly washed and fully dried pillow still smells, the odor is embedded in the fill and will not improve.
• Visible staining has penetrated through the protector and casing into the fill. Surface stains on the casing are cosmetic. Deep staining indicates moisture has reached the fill, where mold and bacteria may be present.
• Allergy symptoms worsen despite washing. Dust mite allergen accumulates in pillows over time and may reach levels that washing cannot fully reduce, even with hot water. The American College of Allergy, Asthma, and Immunology recommends replacing pillows every one to two years for people with dust mite allergies.
• You wake with neck pain that resolves during the day. Loss of loft and support is gradual, and your neck adapts until the deficit becomes large enough to cause symptoms. If morning neck stiffness has developed gradually, the pillow may be the cause.

Typical replacement intervals by material: polyester fill every 1 to 2 years, down and feather every 3 to 5 years, memory foam every 3 to 4 years, latex every 4 to 6 years, buckwheat every 3 to 5 years (with hull replacement as needed).

Drying Methods and Their Impact on Pillow Performance

Proper drying is arguably more important than proper washing when it comes to maintaining pillow loft and hygiene. Residual moisture trapped inside a pillow creates an ideal environment for mold and mildew growth, which can trigger allergic reactions and respiratory irritation during sleep. Down and down-alternative pillows are particularly susceptible because their dense fill traps moisture deep inside the pillow core, where it can persist for days after the outer fabric feels dry to the touch.

Tumble drying on low heat with two or three clean tennis balls or wool dryer balls is the most effective method for most pillow types. The dryer balls physically agitate the fill material, breaking up clumps that formed during washing and restoring the even loft distribution that determines how well the pillow supports your cervical spine during sleep. Plan for a longer drying cycle than you might expect — most pillows require 60 to 90 minutes on low heat to dry completely. To test for residual moisture, press the pillow firmly between your hands after the cycle ends. If you detect any cool spots or dampness, run an additional 20-minute cycle. Memory foam pillows should never go in the dryer; instead, press out excess water gently and air dry in a well-ventilated area for 24 to 48 hours, flipping every few hours to ensure even drying throughout the foam structure.

Drying Techniques That Prevent Clumping and Mold

Proper drying is the step most people rush through, and it is where the majority of pillow damage occurs. Residual moisture trapped inside a pillow creates an ideal environment for mold and mildew growth — conditions that may not produce visible signs for weeks but will eventually generate musty odors and potential allergen issues. Down and down-alternative pillows require the longest drying times: two to three full dryer cycles on low heat, with clean tennis balls or dryer balls added to break up clumps as the fill dries. Remove the pillow between cycles and manually redistribute any fill that has compacted, then resume drying.

Memory foam and latex pillows must never go in a dryer — the heat degrades the foam structure and can cause permanent deformation. Instead, press excess water out gently without wringing (which tears the cellular structure), then lay the pillow flat on a clean towel in a well-ventilated area. A fan directed at the pillow accelerates drying significantly. Allow 24 to 48 hours for complete drying before returning the pillow to service. To confirm that a pillow is fully dry, press your face into the surface and inhale deeply — any detectable dampness or mustiness indicates that moisture remains trapped inside and the pillow needs additional drying time before use.

The Protector Difference

A zippered pillow protector, worn between the pillow and the pillowcase, is the single most effective measure for reducing how often the pillow itself needs washing. The protector catches the sweat, oil, and skin cells that would otherwise penetrate the casing and reach the fill. Wash the protector every two to four weeks (it fits in a standard washing machine with your regular laundry), and the pillow itself may only need washing once or twice a year.

This is not an optional accessory. It is the difference between a pillow that remains clean and supportive for years and one that becomes a colony of dust mites and absorbed body fluids within months. A two-pack of zippered pillow protectors costs $10 to $20 and pays for itself in extended pillow life many times over.

Clean pillows are not just a hygiene issue. They are a sleep quality issue. A pillow contaminated with allergens, body oils, and compressed fill does not support your head or maintain the sleep surface you chose it for. Washing your pillows is not optional maintenance; it is part of maintaining the sleep environment that lets you sleep well.