Any salt left on the surface may cause pitting. Wash thoroughly in warm water and a mild soap detergent. Soft aluminum such as the 1100 and 1150 alloys are susceptible to damage from too much heat. Food, water and oils help to absorb the heat. Do not leave an empty pot or pan more than a minute on the heat source.
Most cookware has a guarantee against defects.
Problems caused by misuse are not covered by a Manufacturers' guarantee. Confirm with your supplier if the detergent you use is safe on your fry pan or bakeware's non-stick coatings. To clean burnt or scorched food on pots or pans, sprinkle a layer of baking soda across the stain, adding just enough water to moisten. Let stand for several hours. To restore color and shine to aluminum pots and pans, boil apple peels in them for 5 minutes.