Cast iron pans have become popular again. It is important to clean them properly. To make your own cast iron skillet cleaner just sprinkle lemon juice and salt on the rusty iron skillet. Wipe out the rust and then season with a lot of oil. Put the skillet into the oven (200° F) for one hour. Remove from the oven and wash the skillet. Dry thoroughly and apply with more oil. Wipe off any excess oil. Never let cast iron air dry or it will rust.