We just moved in to a house we are renting with a Whitfield advantage pellet stove. We've never had one before and the owners left us with not much info on it and the wrong ( similar, but not the same) manual for it. We used it a few times and it was burning ok. Wasn't heating up the downstairs of the house like we were hoping. So, we just thought it needed a good cleaning. followed the manual to the best that I could on how to clean it. Removed the firebricks and got all the ash build up from behind them ( the baffles?), cleaned the exchanger tubes and the area around it, scraped the burn grate, cleaned the glass, emptied the ash tray. Put it all back together and now the ash is building up on the sides of the burn grate/pot. There is still ash falling through the grate in to the tray, but a lot is building up and collecting on the sides of the pot and it didn't do that at all the first few times we used the stove. Nothing has changed other than me cleaning it out. So, where did I screw up? It's a nice fire going but it is popping up the burnt pellets like popcorn outside the pot. And the air coming out of the stove is just warm, I can stand right in front of it and it doesn't get very hot. This whole thing is so new to me, and I want to try and make it work before giving up and buying a heater!