How do I clean a kitchen sponge?
Kitchen sponges can harbor several types of bacteria. To clean the sponge, there are two methods that, according to a research agency from the U.S. Department of Agriculture, will kill more than 99 percent of the bacteria. The first method is to place the sponge in a microwave on high for one minute. The second method is to place the sponge in a dishwasher and run it for one full cycle, including the drying process. Other methods include soaking the sponges in lemon juice for one minute, though this was found to only kill 37 to 87 percent of the bacteria, according to the U.S.