Mostly I just use a wad of paper towel or a few doubled over pipe cleaners to wipe down the chamber walls, rather than let cake build up. But If I'm going to ream the pipe I use any or a combo of the following:
British Buttner for conical chambers, Pipnet (not the POS Castleford knock off) for cylindrical chambers, a Pilot marker pen or shaped piece of doweling, wrapped with sand paper or glass paper.
British Buttner for conical chambers, Pipnet (not the POS Castleford knock off) for cylindrical chambers, a Pilot marker pen or shaped piece of doweling, wrapped with sand paper or glass paper.