Aluminum bakeware is durable and long lasting. It can withstand the high temperatures of baking, but food can become stuck to the surface of the cookware. Removing stuck-on food and treating the cookware with cream of tartar will clean it without causing scratches that can occur from abrasive cleaners. Never use metal utensils to clean aluminum cookware because they can gouge the surface, leading to rust.
Fill the aluminum bakeware with warm water. Add enough liquid dish soap to create suds. Agitate the water with a sponge. Leave the bakeware to soak for one hour. Use a wooden spatula to scrape off any loosened food particles.
Rinse the bakeware with clean water. Fill it with 1 qt. of clean water and 2 tbsp. of cream of tartar.
Put the bakeware in the oven at 400 degrees Fahrenheit until the water comes to a boil. Leave it in the oven for 10 minutes. Remove the bakeware and dump out the water.
Fill the bakeware with soapy water. Scrub the inside with a soft sponge. Rinse out the cookery and dry it with a clean towel.