What is going on here? Shouldn’t something that’s soaked in dishwashing soap and hot water several times a day be clean, for goodness sake? Well, no, not exactly.
Mold and mildew don’t care about soap. Mold and mildew don’t care about hot water. Mold and mildew care about musty, airless, damp environments. That’s where mold thrives and that’s an accurate description of your kitchen sponge. Because mold in its many forms can make you and your family quite sick, it’s a very good idea to remove the mold from your sponge as quickly as possible.