The direct answer is: Absolutely do not do this! While throwing your memory foam pillow directly into the washing machine and dryer might seem effortless and hygienic, this action is practically "murdering" your pillow. Here's why you should definitely avoid these two machines, and some more reliable cleaning methods:
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Why is a washing machine the "nemesis" of memory foam pillows?
The structure will be torn apart:
Washing machines generate strong pulling forces during rotation and agitation. Although memory foam is soft, it's not as tear-resistant as ordinary cotton fabric. The machine's rough treatment will likely shred your pillow into a mess of broken foam.
Heavy as a rock after absorbing water:
Memory foam has countless tiny pores inside, and it will absorb a large amount of water like a sponge. A water-soaked memory foam pillow becomes extremely heavy, which can not only damage your washing machine's bearings, but the pillow itself will be too heavy to be properly spun dry.
Completely loses elasticity:
Prolonged soaking in water, coupled with the chemical effects of laundry detergent, will destroy the "memory" function of the memory foam, making it no longer conform to your neck when you sleep.
Why is a dryer dangerous for memory foam pillows?
Heat is its natural enemy:
Memory foam is very sensitive to temperature. The high temperature in the dryer will directly "bake" the memory foam material, causing it to deteriorate. At best, it will become brittle and crumbly; at worst, it could melt or even pose a fire hazard.
Irreversible deformation:
High temperatures will forcibly change the shape of the memory foam. Once dried, you might end up with a shrunken, lumpy monstrosity that will never return to its original shape.
So, what should you do if it gets dirty?
Since machine washing and drying are not an option, you can try these gentle methods to care for your memory foam pillow:
Wash only the "cover":
Most memory foam pillows have a zippered cover. You only need to remove the cover and wash that layer in the washing machine. Spot cleaning: If you accidentally spill coffee or stain the pillow, use a cloth dampened with a little warm water and dish soap to gently wipe the stain. Do not soak the entire pillow.
Vacuum cleaning method:
If you think there's dust or dander inside the pillow, use a vacuum cleaner to clean the surface of the memory foam pillow. This is much safer than washing and effectively removes allergens.
Natural air drying:
If the pillow is slightly damp or has an odor, let it air dry in a cool, well-ventilated place. Remember: Do not expose it to direct sunlight, as ultraviolet rays can cause the memory foam to deteriorate.

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