I've had the stove since Thanksgiving and have been very pleased with performance and have enjoyed the heat very much. I have operated the stove successfully without incident. Within the last week, a couple of times when I have attempted to reload with fuel, smoke began billowing out of the open door into my house. Even with the stove heated up to 400+ the smoke came out. I plan to check the chimney bacause this seems to be a draft issue. Maybe my chimney cap is clogged. The entire flue needs cleaning? Anyone had this issue before? I am wondering if there could be some clogging in the secondary burn chamber? As you look up into the stove, you can't actually see the flue pipe. Thanks for any tips you have.