do it yourself clean cast iron
Remove Baked-on Residue. 1  1. Scrub with oil and salt. Mix olive oil and a few tablespoons of salt in a small dish. 2  2. Wipe the cast iron with an oiled cloth. Take a second paper towel or cloth, dip it in oil, and wipe the cast iron until it is clean. 3  3. If the food is impossible to dislodge, bake the cast iron. Set the cast iron cookware in the oven.