Mattresses Here’s a tempting secondhand purchase. The best mattresses are expensive new, and it’s not uncommon to see “barely used” options for sale online or at resale shops. The problem: Mattresses are extremely difficult to clean thoroughly. Maldonado, who is also a chemist and biologist, says old mattresses can harbor everything from allergens to bacteria to pests (I mean, just think of the possibilities!). Dust mites—microscopic creatures linked to allergies, asthma and skin conditions like dermatitis—thrive in mattresses because they provide an ideal habitat: warm temperatures, humidity and a steady supply of their favorite food, human skin cells. Mattresses can also harbor bed bugs, which the Centers for Disease Control and Prevention says can cause severe itching, sleep loss and secondary infections from scratching. And once you have bed bugs, you are in for a massive amount of time and expense getting rid of them. If you absolutely must buy a used mattress, inspect it c...
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