I know not to wash it with soap and water. I've always put some water in it and heated it until most of the food is gone or is easily scraped off. Then I use a green scratchy pad on it, rinse, and dry on the stove. When it needs re-seasoning, I put some grease in it and bake it in the oven at 200 for several hours. Then I let it cool and remove the excess grease. This was the method my grandmother and mother used, but I heard recently to scrub them with salt, so I'm curious. How do you clean and re-season your cast iron goodness? Thanks!