It is generally recommended to dispose of the foil after each use, especially if it has come into contact with raw meats or other potentially harmful foods. For hygiene reasons, it’s best to start with a fresh piece of foil every time you bake.
However, if you only use the foil for dry goods like cookies or crackers and it is still in good condition, you can carefully fold and store it for re-use. Always make sure to clean and sanitize the foil properly before using it again to avoid any contamination.