The cast iron dutch ovens need to be "seasoned" when they are first used. This is a process where oil, usually vegetable oil, is wiped/rubbed into the metal. Then the dutch oven is heated, usually in a regular oven. One of my assistant Scoutmasters always insisted on doing it 5 times to a new dutch oven before using it. I always thought that was a bit extreme myself. Twice was usually enough.
Once a dutch oven has been seasoned, it should never be washed with soap and water because it removes all of the "seasoning" and the cast iron begins to rust. And that is really a pain to get off! To clean a dutch oven after being used, all that is needed is to scrape out any residue and then wipe the inside down with a paper towel.
Guess Phil and I were typing at the same time! At least we both agree on the basic process. Must be right, huh Phil!? /forums/images/graemlins/smirk.gif /forums/images/graemlins/grin.gif