Never had this problem before. Triple processed in AR filtered and put complete filter w clean gold into small crucible, added Borax to keep it from flying off and this is the only time I’ve had this problem. I have used two cans of Map on it and it glows bright orange/yellow, gold is melting but the remnants of the filter seem to be pure carbon at this point and I can’t get burn it off. Any ideas? I’m down to one good map torch head but it should still be plenty for 7 grams of gold. Here’s detailed pics. I tried separating it and putting pieces into another crucible. Help!