The more you use the cast iron skillet/etc., the better they work. We make cornbread in our skillet all the time. You don't want to submerge them in the sink with Dawn, or soaps, which removes the surface you built up in the "curing" process.
I have taken old rusty skillets that people wanted to trash and cured them back to looking like a new skillet. Lightly wire brush them, wipe them down good, apply vegetable oil, heat, cool, wipe down, repeat.
I have taken old rusty skillets that people wanted to trash and cured them back to looking like a new skillet. Lightly wire brush them, wipe them down good, apply vegetable oil, heat, cool, wipe down, repeat.