After using aluminum coils, it's important to clean them properly to maintain their performance and longevity. Typically, a mild detergent and warm water solution can be used to gently clean the coils. Avoid abrasive materials or harsh chemicals that could scratch the surface. Rinse thoroughly to remove all detergent residues. For stubborn residues, a soft cloth or sponge can be used. It's also crucial to dry the coils completely to prevent corrosion. Regular inspection and maintenance, including cleaning, will help extend the life of aluminum coils.