Remove rust or buildup with a steel wool. Use a vinegar-water spray if needed.

Wash with hot water and soap, then dry thoroughly.

Heat on the stovetop to eliminate moisture.

Rub a thin layer of oil inside and outside.

Wipe off excess with a lint-free towel.

Bake upside-down at 425–500°F (220–260°C) for 1 hour. Let cool before storing.