Make your own magic erasers for cleaning! Okay I checked this out and sponges are melamine foam, used to sound proof things. Apparently, melamine foam is an open cell foam that, when mixed with water, acts like a super micro-fine sandpaper easily removing the toughest stains around your house! google search melamine foam or go to amazon.com and do it, they have them, checked amazon out, comes in big packs, different sizes, this is good!!