I've had a xxv for about 2 months now, been working great (tried to post pics of the install but the files were too large, once i figure out how to downsize them a little I'll try to get them up). Anyhow, the last 2-3 days it seems like the flame is burning huge, it goes up to the top of the stove and kinda wraps around the edge. It's causing the window to get dirty withing 2 hours or so. I haven't changed pellets and I believe I've been keeping the stove clean. Two questions, one any thoughts on the change in "burn"? Two, any danger to run it like this? Thanks in advance for your help!