Stove just has not been putting out the heat, like I thought it should... kept turning it up a little but usually don't have to do that... Then I was thinking.... 'It's been a while since I cleaned it'. I know.. I know..! follow the suggestions in the manual! And what everyone else does... But... I just don't think of it.. or... put it off. Yesterday it was near 50° so I thought it was a good time to do it. I honestly can't remember the last time I did.. Well.. it was pretty dusty... heat exchanger, and side panels had more "insulation" than my house.. So I did a good clean job.. Holy crap... talk about a shot of B12.. Got the room up to 75° about 20 minutes after re-fire... Turned it back down, it was 71° this morning when I got up. (usually around 67-68). Moral of the story. Well... you know. Dan