I have some cast iron that needs to be reseasoned. I don't remember how it is done. How do you get years of use off and what is the proper way to clean them after use? Can you just wash them in a sink of warm soapy water. If not how are they sanitized? Thank you!
Sorry, I didn't read through the other answers, so I might be repeating or even contradicting the others, but here goes…
I've been using cast iron cookware for years, as has my father. He is set in his ways about how to take care of them, and his main rule is "NEVER wash them in soapy water!" This removes the seasoning you work so hard to put into the pans.
Whenever he gets a new piece of cast iron (I say "new" but mean "new to him" because the ones on the market today are pieces of junk and not mirror smooth on the inside) he will have it sandblasted to remove all residue on it. (this makes them a shiny (silver) color instead of black) Then he bakes them for several hours in the oven on a low temp with bacon drippings or cooking oil. Cast iron is porous, and the heat will cause the oil to spread throughout the pan. Keep checking on them, and adding the oil/grease to it. The pan should start to darken. You want it to be near black by the time it is ready.
To clean: Wash in hot running water. Use a steel sponge, but do not scrub hard, unless there is a stubborn cooked-on food spot. Dry immediately on a hot stove top. Dab a paper towel in shortening or bacon grease and rub into dry hot pan (be careful to not get burnt) or just spray with a cooking spray.
Do not ever let pan sit in water for long periods of time, or let water sit in pan. This will cause rust and/or remove your seasoning.
The heat from the washing, and drying is enough to sanitize your pan.
A properly seasoned pan is almost non-stick. Glassy smooth on the inside, and crusty on the outside.
Another tip, always spray with a little cooking spray before cooking anything in it, even if it doesn't call for it. This ensures your cookware will absorb the spray first before the food.
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