I recently purchased a pleasant hearth model PH50CABPS. I've been using it for about 3 weeks now and have been pretty happy with it. I did notice that the burn pot does not have any holes in the bottom of it which I found somewhat odd. How is the ash suppose to exit the pot? Towards the end of the day the ash builds up to the point where it covers some of the holes on the side of the pot which restricts some of the air. When the unit first burns for a while I get a nice bright yellow flame. After a while sometimes the flame will be orange in color and I can tell that it's burning a bit dirtier. Should I modify the burn pot or see if a different one would fit? What is everyone's thoughts on this?