Paper towels lead a brief and unglamorous life, absorbing spills, wiping away messes, and substituting for napkins and even tissues. Sponges are the most frequently used item for kitchen cleanup, but unless they’re kept scrupulously clean, they can become germy and smelly. Ditto dish towels. A fresh paper towel is a better choice. But you can’t use them for everything. Here are five “aha!” uses for those handy helpers and four things you shouldn’t use them for, even in a pinch.