Hello all I had a fire this morning it was just at the coating stage and I was going to let it go out as we were leaving. I open the door and it sounded like something was falling down the liner. Like snow ice but I don't see how that could happen. I went for a minute or two the stoped but if I closed the door and opened it again the same thing would happen. I freaked out and thought a flue fire but didn't ran outside and didn't see anything.