I recommend using cotton balls. Like ap said,paper towels as well as other rags wil scratch and haze up the blastic. I usually soak 3 cotton balls, first one to soften the stamp,2nd to remove stamp,and 3rd to clean up any residue left over from the stamp. Then I wash it with mild dish detergent and water.then is ready to dye. I've used rubbing alcohol and nail polish remover(with acetone) before and I get the same results but takes a lil elbow grease. Get some acetone and cotton balls and ull be set. It won't cost no more than 10 bucks for both items in a good size