How can you remove stains or blemishes from a polyurethane watch?

You can remove stains or blemishes from a polyurethane watch by scrubbing it with a wet terrycloth that has been dipped in a solution of warm water and liquid dish soap. For tough stains, dip a melamine foam sponge into the solution, ring out and wipe the watch gently. Dry well with a clean towel.