This happens to me more often than I’d like to admit, because I’m so conscious of my environment and mold, but I’ll be cleaning my kitchen and come over to where I keep my dish sponge and counter sponges and I’ll smell it—that funky moldy, mildew smell. The minute it hits me, I know I have let my sponges sit too long. They are full of mold, and they smell really bad. Now what? How can I clean my sponges for mold and bacteria?