Tips for cleaning cast iron skillets.
Clean the outside of the pan with commercial oven cleaner. Let set for 2 hours and the black stains can be removed with vinegar and water. After cleaning pan, take a piece of wax paper and, while skillet is still warm, wipe around the inside to prevent rusting. When clean, rub a small amount of oil on the inside of the pan to keep it seasoned. To remove charred food and burn spots from cast iron skillets, boil vinegar and salt in the skillet.