Although doing dishes isn't one of my top kitchen pet peeves, hand-washing dishes with an old sponge is. The thought of spreading bacteria and grime, rather than actually cleaning an utensil or plate, makes my skin crawl more than a full moon on Halloween. Although most people simply replace their dish sponge when it starts smelling, I swap mine out much more frequently than that — probably every two to three weeks. I know it's not the greenest move in the world, but I can't help it! How often do you swap out dish sponges?