Hi Folks...I have been given one of those things that removes heat from your stove pipe and blows it into the room....it's out in my shed and I can't think of the name of it off the top of my head. Anyway...is there some way to clean the part where the flu gas goes through? There is a thing that slides back and forth to clean the pipes but there is so much stuff on them I can't make it move. Any advice would be helpful..thanks. Franklin