How Often Should You Change Your Kitchen Sponge?

Kitchen sponges can accumulate bacteria, including pathogens like E. coli and Salmonella. A study by the German Federal Institute for Risk Assessment found these bacteria can survive and multiply for at least two weeks. Experts recommend replacing sponges weekly, especially in households with vulnerable individuals, and immediately after contact with raw meat, poultry, or fish. While washing in the dishwasher or heating in the microwave can help, these methods may not eliminate all bacteria and could promote resistant strains.