The birth control or contraceptive sponge is a polyurethane disc soaked in spermicide. It’s designed to be inserted deep into the vaginal canal ahead of penis-in-vagina sex to prevent pregnancy. The ...

Ah, the humble kitchen sponge—a silent hero in the war against dirty dishes and saucepans with stubborn stains. But if you’ve never considered how to clean a sponge itself, we have some bad news: It’s ...