We are going to clean our chimney and double wall stove pipe for first time. Got stove in Jan, 2006, want to be on safe side. Have the poly brush and rods. I have posted before about how to clean with this type of stove. Still a little unsure. It is Supervent stainless chimney. About 13 1/2 feet total with stove pipe. Straight up thru cathedral ceiling. When we look inside top of fire box of stove there is what I believe is the secondary burn unit, kind of like a burner on a gas grill, with holes in it. not to be removed for cleaning according to manual, on top of that is a ceramic fiber baffle. I know we remove top rows of firebrick, and remove baffle. So we clean the chimney from the roof, and everything falls down, but will land on top of the metal burn unit, which will be difficult to get to. In other words, its not like the old stoves where everything would fall into firebox. The stove is a new Napoleon. We would like to avoid having to disassemble any stove pipe, or is this going to have to be done? Any suggestions, anyone?