TO REMOVE DIRT & GRIM: Sprinkle surface with baking soda (simply poke holes in top of baking soda box) and spray with white vinegar (in a spray bottle) -- It will foam (loosening grim), then scrub if needed. FOR HARDWATER (EVEN RUST) STAINS: Cut a lemon in half and use the lemon to scrub.
The "miracle" of baking soda and peroxide. Put 1/4 cup of baking soda in a bowl.....add enough peroxide to make a paste. Rub on with fingers or sponge. Cleans EVERYTHING! Stove, oven, pans, stainless steel applicances, even the white handles of the refrig door.
I am never buying white strips again!: dip q-tip in hydrogen peroxide (the key ingredient in whitestrips) and apply to surface of teeth for 30 sec before brushing teeth) once a day for a few days.