“Washing or changing your pillowcase at least once a week ensures you are consistently removing bacteria, dirt, oil, hair products, skin care products, dust, and other allergens that accumulate over the week,” Dr. Salame says. “If you have acne-prone or sensitive skin, washing or changing your pillowcases every two to three days reduces the oils, bacteria, dust, and other particles that build up on the pillowcase and can be the first step to improving your skin. If you are someone who sweats overnight or uses extensive hair products, washing or changing your pillowcase every one to two days is also recommended.”
Wondering how to wash silk pillowcases? Make sure to read the product’s specific care instructions. Some can go in the washing machine on a cold, gentle cycle (ideally in a mesh delicates bag), while others require hand-washing in lukewarm or cold water. Air-drying is best, since heat can weaken the fibers and cause shrinkage, though many brands allow low-heat tumble-drying if needed. To keep them looking fresh, you can steam or lightly iron on a low setting to remove wrinkles.
As for longevity, silk pillowcases are delicate but surprisingly durable when cared for properly. Expect them to last for years, especially if you choose a higher momme count, which makes the weave denser and stronger. Most testers noticed small changes—like loss of sheen, extra wrinkling, or stains—around the six-month mark, but the pillowcases remained soft and usable well beyond that.
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