You wash your sheets every week, but when was the last time you thought about your pillow? If it’s started to smell a little musty, look a little yellowed, or just feel less supportive than it used to, it’s not your imagination. Pillows absorb sweat, oils, and dead skin every single night, and memory foam holds onto all of it a bit differently than a standard fiber-fill pillow does.
The good news: keeping a memory foam pillow clean and long-lasting isn’t complicated. It just requires a different approach than tossing it in the wash. Here’s exactly how to do it.
Why Memory Foam Care Is Different From a Regular Pillow
Traditional pillows are often filled with down, feathers, or polyester fiber that can go straight into a washing machine. Memory foam is a solid, dense material, and soaking it in water can break down its cell structure, leave it waterlogged for days, and eventually cause it to crumble or lose its supportive shape.
That’s why nearly every memory foam pillow, including the Nekrelief Pillow, is designed with two parts: a removable, washable cover and a foam core that should never be fully submerged. Understanding that distinction is the key to caring for it properly.
Washing the Removable Cover
The cover is where most of the sweat, oil, and everyday grime actually collects, so it’s also your first line of defense for keeping the whole pillow fresh.
Machine Washing
Most pillow covers can be machine washed in cold or warm water on a gentle cycle. Use a mild detergent and skip the fabric softener, which can leave a residue that traps odor over time. Always check the care label first, since fabric blends vary by pillow.
Drying the Cover
Air drying is the safest option for most covers, especially if they contain any stretch or moisture-wicking fabric. If you do use a dryer, choose a low-heat or no-heat setting to avoid shrinking the fabric so it no longer fits snugly over the foam.
Aim to wash your cover every one to two weeks, or more often if you tend to sleep hot or use skincare products at night.
Cleaning the Memory Foam Core (Spot-Cleaning Method)
The foam itself should never go in a washing machine or be soaked under a faucet. Instead, treat it the way you’d treat a mattress: spot-clean as needed.
- Mix a gentle cleaner. Combine a small amount of mild liquid detergent with cool water in a bowl.
- Dab, don’t soak. Dip a clean cloth into the solution, wring it out well, and gently blot the stained or soiled area of the foam.
- Rinse with a damp cloth. Use a second cloth dampened with plain water to blot away any soap residue.
- Press out excess moisture. Place a dry towel over the spot and press firmly to absorb as much water as possible before letting it air dry.
For light odors rather than visible stains, a baking soda treatment (covered below) is usually enough, so you can skip the wet cleaning altogether.
Drying Your Pillow the Right Way
Memory foam takes longer to dry than fabric because moisture has to escape from deep inside the material, not just the surface. Rushing this step is one of the most common care mistakes.
- Dry flat, not upright, so the pillow keeps its shape while it dries.
- Choose a well-ventilated spot indoors or in the shade outdoors. Direct sunlight and heat sources like radiators or hair dryers can weaken foam over time.
- Flip it periodically to help both sides dry evenly.
- Wait until it’s completely dry before putting the cover back on or using the pillow again. Trapped moisture inside foam is a fast track to mildew and odor.
Depending on humidity, full drying can take anywhere from a few hours to a full day, so plan spot-cleaning for a day when you have a backup pillow on hand.
Everyday Habits That Keep It Fresh Longer
A little routine maintenance goes a long way toward reducing how often you need to deep clean at all.
Use a Pillow Protector
A breathable, washable protector under your pillowcase creates a barrier against sweat and oils, so most of the grime ends up on something you can toss in the wash weekly instead of on the foam itself.
Air It Out
Let your pillow breathe by leaving it uncovered in open air for an hour or two on wash day. Memory foam that’s brand new can also carry a faint off-gassing smell, which typically fades within the first week or two of regular use and airing.
Keep Nighttime Products Away From the Foam
Facial oils, hair products, and lotions are common culprits behind yellowing and odor. If you use them at night, give them a few minutes to absorb before lying down.
Round Out Your Sleep Setup
Clean gear supports better sleep across the board. A washable Silk Eye Mask can block light without irritating your skin, and if you’re a side sleeper dealing with hip or lower back discomfort, a Knee Pillow is designed to support spinal alignment and may help relieve pressure alongside your regular pillow care habits.
When Cleaning Isn’t Enough: Signs to Replace
Even with great care, memory foam doesn’t last forever. If your pillow has developed a permanent odor that won’t lift, visible yellow stains that spot-cleaning can’t touch, or if it’s lost its ability to spring back into shape, it’s likely past the point of cleaning and closer to needing a replacement. For a full breakdown of the signs, see our guide on how often you should replace your pillow.
If you’re shopping for a new one, the Nekrelief Pillow is built with an ergonomic contour designed to support proper neck alignment, and it ships free anywhere in the US with a 100-night trial, so you have plenty of time to make sure it’s the right fit. If you’ve recently switched to a new memory foam pillow and it feels firmer or unfamiliar at first, that’s normal. Our guide on breaking in a memory foam pillow walks through what to expect during the adjustment period.
Frequently Asked Questions
Can I put a memory foam pillow in the washing machine?
No. The foam core can absorb water, break down internally, and take an extremely long time to dry, which can lead to mildew. Only the removable cover is machine washable. The foam itself should be spot-cleaned by hand.
How often should I clean my memory foam pillow?
Wash the cover every one to two weeks. The foam core typically only needs spot-cleaning when there’s a visible stain or persistent odor, which for most people is a few times a year at most.
Why does my memory foam pillow smell, even when it’s new?
New memory foam can carry a mild chemical smell from manufacturing, often called off-gassing. It’s generally harmless and fades within one to two weeks if you air the pillow out in a well-ventilated room before regular use.
Can I use bleach or strong cleaners on memory foam?
It’s best to avoid bleach and harsh chemical cleaners, since they can break down the foam’s cell structure and irritate skin during sleep. Stick with a mild detergent diluted in cool water for spot-cleaning.
The Takeaway
Caring for a memory foam pillow really comes down to two rules: wash the cover regularly, and treat the foam gently with spot-cleaning rather than a full soak. Keep it dry, keep it aired out, and it will keep supporting your sleep for the long haul. If neck pain or numbness that’s persistent, severe, or radiating into your shoulders or arms is part of what’s keeping you up at night, it’s always worth a conversation with your doctor or a physical therapist alongside any changes you make to your sleep setup. And if your current pillow is past saving, the Nekrelief Pillow is ready to take its place, backed by free US shipping on orders over $100 and a 100-night trial.
This article is for informational purposes only and is not medical advice. If you experience persistent, severe, or radiating pain or numbness, please consult a healthcare professional.