How to remove stains on aluminum cookware?

Mild acid solution of vinegar or cream-of-tartar can be used to clean aluminum cookware

The alkalis discolor Aluminum. Don't use bleach or even baking soda. The acids dissolve the aluminum, therefore the aluminum is anodized to harden it.

Mild solution

There are two easy formulations

Solution #1

1 Tablespoons of Distilled white Vinegar to 2 Cups of water.

Solution#2

1 Teaspoon of Cream of Tartar to 2 cups of water.

Method

Prepare a mild acid solution, fill the cookware with stains, let it come to simmer. These solutions work well at 125º F. Simmer for about 15 minutes. Wash and rinse.

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