Sponges are a mainstay in most people’s kitchens. They make wiping down countertops, cleaning dirty dishes, and scrubbing stubborn grease off your pans a breeze (plus plenty more kitchen sponge ...

But is the sponge itself clean? The answer is probably no. "That thing is very dirty," Philip Tierno, a microbiologist and pathologist at the New York University School of Medicine, told Tech Insider.

OK, I have my dirty sponge, and the first step is going to be to dampen it and then soak it in the sponge cleaner that came with the kit. The instructions say to put 20 milliliters, so I'm just ...

There is a middle ground between using a dirty sponge and throwing it away frequently: you can extend your kitchen sponge's life by cleaning it regularly. Soak the sponge for five minutes in a ...