I just went over to my 30-95 and opened the hopper door. By golly it does have a tan crust on it. The crust does smell like sulpher. I sometimes smell sulpher when I open the door and some times not. I think what I have been smelling is escaping gas. The door itself doesn't smell all that strong. I don't worry about it. The smell just triggers a feeling of cozy warmth I associate with my Hitzer.