Installed our pellet stove in our new home 2 months ago. Worked great in our old home with a straight vent pipe. Our new home has a vent pipe that goes straight out and up now. Not sure if that is an issue? We've completely cleaned it (baffles, fireback, refractory, backwall covers, convection blower, exhaust blower, and vent pipe) and that gives us a good fast flame for 2-3 days max and then we go through the cleaning process again. Checked the door gasket with a dollar bill and it's tight. Air vent pulled all the way out and makes no difference. Why are we still getting a lazy flame and the pot filling up?