Use a few tablespoons of cream of tartar with hot water or hydrogen peroxide and clean any aluminum pans which have discoloration or any rusty drains, pans, or stains.
A Great Nonabrasive Cleaner
Mix 2 teaspoons of vinegar and 2 teaspoon of cream of tartar in a small dish (use 3 or 4 teaspoons of vinegar and 3 or 4 teaspoons of cream of tartar if you have more items to clean). Apply with your cleaning rag or scrub brush and let it sit for 5-10 minutes. Scrub. Wash with hot soapy water.