Cleaning stainless steel. For tougher jobs: mix 3 parts cream of tartar with 1 part hydrogen peroxide and then using a damp cloth, massage the mix into the surface. Let dry then wipe with a damp cloth. OR...1 part vinegar, 1 part hot water, 1/2 part baking soda. Scrub mixture into surface using a damp sponge or cloth. Rinse well then dry with a cloth.