Are you people taking about creosote or carbon build up. They are different. I get carbon build up at times in burn pot & on end of auger. Especially with this ton of Somerset I'm trying to get used up. My 2nd ton of somerset, doesn't seem to have anywhere close to the carbon build up as the 1st ton has produced. Creosote is a sticky like tar build up on things. I do get at times, but not very often, on the back wall, inside the burn area, but that seems to happen when it gets extremely hot inside house & it continues to run because I don't have a t-sat. Carbon will just chip off if tapping with something like a screw driver. Creosote stays sticky/tacky to the touch & everything sticks to it.