To remove excess oil from aluminum foil facing after cooking or food storage, you can follow these steps: 1. Allow the foil to cool down to avoid burns. 2. Use a paper towel to blot and absorb the excess oil. 3. For stubborn oil, you can wipe the foil with a damp cloth or sponge with a mild dish soap. 4. Rinse the foil thoroughly with warm water to remove any soap residue. 5. Dry the foil with a clean towel or let it air dry. If the oil is extremely stubborn, consider using a gentle scrubber or baking soda paste to help remove it. Always check the foil for any damage or wear before reusing it.