Why is this answer always so far down in the thread, right below all the nonsense and superstition that perpetuate the "cast iron is really complicated to maintain!"?

Soap and water is all you need, be sure to thoroughly dry the surface. If you get rust spots, just polish them off with a cast-iron cleaning sponge or some steel wool. Re-oil as necessary. Do not put in the dishwasher.

That's it. Not sure why the message gets so muddled with other methods involving stripping and reseasoning and baking and such... It's not required.