After using aluminum foil, it's best to clean it gently to avoid scratching or damaging the surface. You can use warm soapy water and a soft cloth or sponge to wipe it down. Avoid using abrasive materials like steel wool, as they can scratch the foil. If the foil has food residue, you can soak it in warm water with a mild dish soap for a few minutes before wiping. For stubborn stains, a soft brush can be used. Always dry aluminum foil thoroughly before storing to prevent rusting.