If you brew a pot of coffee every morning and have leftover java, save the brew to give your grill a good cleaning. The natural acids in coffee help break down grease, grime and other baked-on messes that have collected on your grill grates. Just pour lots of leftover coffee into a basin and soak the grill grates. Let them sit overnight, and rinse them off the next day. They'll be clean and ready for some barbecue.