I purchased the US Stove gw1949 pellet stove a few weeks ago, set it up with a 4 inch chimney. Fired it up and it has been working pretty well except for one problem that has occurred 4 times now. I'm getting smoke out of the lift hatch that covers the pellet feed rams. When I open it up (its hot) there are pellets burning their way up towards the main pellet storage bin. So I shut the pellet feed door, push a rod through the pellet basket down below, cram the pellets on the feed ramp down. I'm just about to spray it with water, but that seems to work. I vacuum this out almost daily and clean the glass which is pointless. I don't think it should operate like this...Anyone have a similar experience or an idea how to correct this? I texted the manufacture, but they are unavailable due to bad weather.... Thanks for any info. Jeff-