Clean dusting sponges will harden when dried. To re-use simply soak the sponge in water and it will soften in seconds! Just moisten with water to soften before each use. Store upright in a cool, dry place after use. Sweep a pre-moistened dusting sponge across the hard surfaces of your home for fast, efficient dusting. Ideal for cleaning blinds, tables, shelves, nightstands, dressers, counters, faucets, glass, window sills, or anything else that collects dust!