Throw the following items into the washing machine before you use them. "Nothing in a fabric or dye put out for consumer use should be harmful to you, but if you want your new towels and bedding fresh, wash anything that has been handled by other customers," says Alan Spielvogel, the director of technical services at the National Cleaners Association, in New York City.

Sheets: You'll have a better night's rest without protective finishes and resins coating your bed linens.

Towels (bath, beach, dish, etc.): Washing will remove any short, loose fibers along with any finishes. According to fabric experts at Cotton Incorporated, washing may also increase absorbency. The same goes for bathrobes.

Lingerie and Bathing Suits: "If you've tried it on, chances are someone else has, too," says Brian Sansoni of the Soap and Detergent Association, in Washington, D.C.

T-Shirts: Especially if the shirt's creased beyond belief, washing before wearing will prevent you from looking like you put it on as soon as you left the store — or the airport kiosk.

Kids' Athletic Uniforms: Last season's owner could have "forgotten" to give the wrestling uniform one final wash. And it's been living in a box with its sweaty teammates for months.