We use our cast iron skillet and flat pan (I call it) a lot. When we're done with it. We throw some salt on it an smooth it around. Then take a small potato, cut the end or in half and use that to scrub the skillet. My aunt used to do this when she and her family went camping. When she passed away her son took the skillets and use them when they go camping. He has her whole set and the Dutch cooker.