Edited: I do not use soap in my iron ware. I make sure it is very very dry before it is stored. I also use spray in my pans when cookiung.. I remember as a child my mother would set an iron pan in the fire place and keep turning it around to burn off the charred grease. Then she would wash and season it and it would be good as new. When I have to season an iron pan, I wipe Crisco on the inside, set it in a moderately hot oven, let it bake awhile, and then turn the oven off and let the pan cool in the oven.