Good for surface cleaning of books, especially cloth boards
I have been happy with this product for surface-dirt removal on old non-glossy dustjackets, cloth boards and spines, and the page block edges (quick swipe 'with the grain' along the top-edge takes off dust build-up). I have found it especially good for brightening up cloth boards that have become dingy with surface dirt. This is not a stain-remover. If you deal with a lot of dusty books, this is good for freshening them up.<br /><br />UPDATE: We are about to re-order some of these. We got a good year out of them, and really should have re-ordered at that point. It speaks well of the product that we've been able to squeeze another year out of them. We rinse them now and then, but in the second year the sponges are still functional, but they start to crumble and lose little pieces. It's a sponge, and we use them pretty heavily, so this is not a big problem for me. The price is right for replacement. We'll re-order again I am sure.<br /><br />We use these to clean dust off the top of the page block, and to take surface dust and mold off of the boards of a hardcover. Sometimes when end-papers get moldy, you can use these sponges to take the worst of it off. Same with the underside of dust jacket that has been exposed to mold.
Rating: 4 stars