Most of the new ovens are already conditioned and this step can be omitted. But if you acquire an oven that is not seasoned, use the following procedure.
Put 3-4 cups of warm water in the Dutch oven. Use a bristled brush and clean out the inside of the oven thoroughly.
The heat source for a Dutch oven can be either charcoal briquettes or campfire coals. Charcoal briquettes are the most convenient way to heat.