Wash the dishes in warm soapy water to remove any dirt from the surface. Dry the dishes with a cloth.
Apply a small amount of white toothpaste to the dish and rub it into the tarnished surface with a paper towel. If the dish is large or you have a large number of them, sprinkle them with baking soda and rub them with a damp cloth to remove the tarnish.
Rinse the dishes well in running water and dry.
Polish the dish, if desired, using a polymer metal polish, such as an auto polish. Moisten a corner of a soft cloth with a small amount of polish and rub the dish in a swirling motion. When the polish leaves a hazy cast, buff it off with a dry section of the cloth.