I know this can be a common issue among P800 owners, but, mine is pretty much dead at this time. Haven't used it for maybe four years, tried to feed a roll, and nothing, even after butchering the first few feet of the roll, bending it in all directions. I blasted some air back there, thinking the sensors were covered in paper dust, and, maybe they still are, but, still no go. Anybody go through this?