Hi everybody. I finaly managed to get onto my roof today and sweep my 26 foot ss liner, 6inch, with a poly brush. The top of the liner had a considerable amount of crusty creo whick disintigrated as soon as I touched it. Swept the liner with ease and the thing was nice and shiny as far as I could see. Took the time to re-seal the top plate to the clay liner and re attach the rain cap with some fresh sheet metal screws. Problem is this- I forgot to open the damper of my Harman Exception insert before the sweep. Big dummy! I got back into the house and opened the damper about half way so I could feel around for the soot. I manged to get a vac hose in between the damper plate and the afterburner area and suck up a considerable about of the soot. Do I need to pull the stove out and try and remove more? Is this a hazard if all the of the soot is not removed? Thanks for your help guys.