I moved my stove so I figured I would put it outside on the deck open up the doors and I got a powerful electric blower and blasted it. I had cleaned it out when winter was over. it looked like a volcano eruption. it took ten minutes to where ash dust finally stopped. I looked like a coal miner. I have a P43 and the dust that came out the slot where the airwash air comes out of the series of holes was amazing. I think it will really run good this year and I will do the same to it every year now being I ran it 5 years and never did it