If your cast-iron cookware's seasoning becomes very dull or damaged or if the pan badly rusts, strip and reseason the surface using these tips.
Follow this method to completely remove any residual seasoning on a cast-iron pan before reseasoning it. Easy-Off Oven Cleaner is a caustic alkali, so be sure to work outdoors, wear rubber gloves, and avoid spraying near your face or skin. The skillet will rust instantly once you’ve discarded the vinegar-water solution and rinsed and dried the skillet in step 5, so be sure to immediately apply oil to the surface.
5. Discard solution in skillet. Rinse skillet well, then dry well with paper towels. Using paper towels, immediately rub 1 tablespoon (for 12-inch skillet) or 2 teaspoons (for 10-inch skillet) oil over surface. Using clean paper towels, thoroughly wipe off excess oil (surface should look dry, not glistening).
6. Heat oven to 500 degrees. Place skillet in oven for 1 hour. Using potholders, remove skillet from oven and let cool completely.