This might not be something you think about regularly, but your kitchen sponge can harbor 150 times more bacteria, mold and yeast than your toothbrush holder. Ick! According to a study from NSF International (an independent public health organization), most of the germs they found won’t make you sick, but some could. So, if you’re the person who diligently cleans the kitchen counter, sink and refrigerator shelves, but fails to disinfect your sponge afterwards, try this to keep germs at bay: microwave a wet sponge for two minutes daily and replace it every two weeks.