How to Wash a Pillow: Complete Guide by Material Type 2026

Why Washing Your Pillow Matters

Your pillow absorbs sweat, skin oils, saliva, hair products, dust, and environmental pollutants every night. Over time, this accumulation creates a habitat for dust mites, bacteria, and fungi. A study from the University of Manchester found that a two-year-old pillow can contain up to a third of its weight in dust mites, dead skin, and dust mite feces. For allergy sufferers, acne-prone individuals, and anyone concerned about sleep hygiene, regular pillow washing is non-negotiable.

However, washing pillows incorrectly destroys them. Memory foam dissolves and crumbles. Down clumps permanently if not dried properly. Latex warps under heat. Understanding the correct method for your pillow type preserves both hygiene and pillow longevity.

How to Wash Different Pillow Types

Down and Feather Pillows

Down pillows can be machine washed despite common misconceptions. Use a front-loading washer (top-loaders with agitators can damage the delicate down clusters). Set to gentle cycle with warm water. Use a small amount of mild detergent — excess detergent leaves residue that weighs down the down. Add an extra rinse cycle to ensure all soap is removed.

Dry on low heat with two clean tennis balls or wool dryer balls. The balls break up clumps as the down dries. Expect 2–3 complete dryer cycles — down traps moisture deep inside and feels dry on the outside while still damp internally. The pillow must be completely dry before use to prevent mold.

Polyester and Down-Alternative Pillows

These are the easiest pillows to wash. Machine wash on gentle or normal cycle with warm water and mild detergent. They're less delicate than down and tolerate standard washing machines well. Dry on medium heat for 45–60 minutes. Polyester dries much faster than down because the fibers don't absorb water deeply.

However, polyester pillows have a short lifespan, and frequent washing accelerates their degradation. If your polyester pillow is over 6 months old, consider replacing it rather than washing — the fill is likely already compressed beyond recovery.

Memory Foam Pillows — Spot Clean Only

Never machine wash solid memory foam. The foam acts like a sponge, absorbing water that it cannot expel. Wet foam develops mold from the inside out, and the tumbling action of a washer tears the delicate cell structure.

To clean memory foam: remove the cover and wash it separately. For the foam itself, mix a solution of mild detergent and water, dip a clean cloth, and gently blot stains. Never saturate the foam. After cleaning, let the foam air dry completely in a well-ventilated area — this takes 24–48 hours. A fan accelerates drying.

Latex Pillows — Hand Wash Only

Latex can be washed but requires care. Fill a basin with lukewarm water and mild detergent. Submerge the pillow and gently squeeze — don't twist or wring, which can tear the latex. Rinse thoroughly with clean water. Press gently between towels to remove excess water, then lay flat to dry in a ventilated area. Never use heat or direct sunlight, which degrades latex. Drying takes 12–24 hours.

Buckwheat Pillows — Wash Case Only

Never wash buckwheat hulls — they absorb water and will mold before drying. Empty the hulls into a large bowl or container, wash the cotton case in the machine, dry it completely, then refill. If hulls need refreshing, spread them on a baking sheet in sunlight for a few hours — UV light kills bacteria and eliminates moisture.

General Washing Tips

• Wash two pillows at once: This balances the washer drum and prevents the machine from becoming unbalanced during spin cycles
• Use mild detergent: Harsh detergents break down fibers and leave residues that irritate skin
• Avoid fabric softener: It coats fibers, reducing breathability and creating a waxy buildup
• Wash covers separately: Pillowcases and protective covers can be washed more frequently — weekly is ideal
• Check seams before washing: Repair any loose stitching to prevent fill from escaping during the wash

Common Washing Mistakes to Avoid

The most frequent error is using too much detergent. Excess soap leaves residue that attracts dirt and irritates skin. Use half the recommended amount for pillows. Another mistake is washing memory foam or latex in a machine — the tumbling action tears foam and the waterlogging causes irreversible damage. Using high heat to dry down pillows scorches the delicate clusters and reduces loft permanently. Overloading the washer causes uneven cleaning and can damage both the pillow and the machine. Finally, never store a pillow before it's completely dry — even slightly damp fill develops mold within 48 hours.

How Often to Wash

Pillow Type	Wash Frequency	Method
Down/Feather	Every 3–6 months	Machine wash gentle
Polyester	Every 2–3 months	Machine wash normal
Memory Foam	Spot clean as needed	Blot with damp cloth
Latex	Every 3–6 months	Hand wash
Buckwheat	Case only, monthly	Machine wash case

FAQ

Can I wash a memory foam pillow?

No — machine washing destroys memory foam. Spot clean only with a damp cloth and mild detergent. The foam absorbs water and cannot fully dry, leading to mold.

How do I wash pillows without a washing machine?

Hand wash in a bathtub or large basin with mild detergent and warm water. Rinse thoroughly and squeeze out excess water between towels. Air dry completely before use.

Can I wash pillows with baking soda?

Baking soda deodorizes but doesn't clean effectively. Add 1/2 cup to the wash cycle for odor removal, but use detergent for actual cleaning. A vinegar rinse also neutralizes odors.

Why does my pillow smell after washing?

Incomplete drying causes musty odors. Down and memory foam are particularly susceptible. Always ensure pillows are completely dry before returning them to the bed.

Should I wash new pillows before using them?

It's recommended. New pillows may contain manufacturing residues, dust, and off-gassing chemicals. A quick wash or airing removes these and ensures a fresh start.