Also, take note to NEVER use anything metal when mixing this product, or it will affect the product since a metal will give this some chemical reaction. (stylevanity.com)
I have noticed on this site everyone is saying cover it with cloth, don't use anything metal. (kefir.net)
Important Notes: Do not let healing clays like Bentonite come in to contact with anything metal, as this will reduce the effectiveness. (wellnessmama.com)