Thanks, Pete, for the video. Looks very toasty! I haven't tried an overnight burn yet. I am burning 3 year old wood, stored under cover. I notice the blackness building up in the corners even while the stove is burning at 350 degrees. It gets progressively worse as time goes on, and in the morning the entire cooled glass has a thick coating on it. In my climate we don't need to keep the stove going 24/7, oftentimes we don't build a fire until we get home in the evening. (We also have a furnace) I suppose the next thing to try is a very hot fire to see if burns off the deposit. I am also going to talk to the stove dealer. Another thing I have found with this stove is that it generates a lot of heat out of the bottom. The heat shield doesn't seem to help. The old stove had firebrick on the bottom, so it wasn't an issue. Our hearth was thick enough for that stove, but I'm wondering whether we need to add another plate under the stove, resting on the hearth and held up an inch or so for air circulation. It gets really hot! Downdraft doesn't seem to be a problem so far. We had a windy night recently and I didn't notice any puffing. Right now I'm feeling a little disillusioned. I don't want to spend precious time scrubbing the window just so I can see the fire.