I am wondering if there is a rule for moving snuffs around. I take out bits from bigger containers into smaller ones. And am starting to get a metallic smell. Perhaps it's the spoon I am using. The spoon itself doesn't emit an aroma, but maybe once it touches the snuff it does. It's an old spoon, but looks plated like with chrome perhaps. Do you guys use plastic for moving it around is this a golden rule?