Alternatively, place a muslin or cotton cloth over the jar's top. Secure it in place with an elastic band. Cloth blocks out most of the air flow but permits just enough to prevent mold. Do not use a solid metal cap
Alternatively, place a muslin or cotton cloth over the jar's top. Secure it in place with an elastic band. Cloth blocks out most of the air flow but permits just enough to prevent mold. Do not use a solid metal cap