Tortilla press made of cast iron, coated in silver paint, are especially designed to make authentic corn flours in the artisan way. Each press comes with a plastic sheet that must be placed between the 2 walls, as the dough must not touch the metal. Rinse with hot water and dry thoroughly prior to initial use. After use, the press should be relatively clean, and a wipe down with a dry towel should suffice. If that is not enough, clean immediately with hot water and a brush. Rinse and dry thoroughly.