I'm soliciting advice: I just purchased a new DCC system. At first my only (so far) decoder-equipped loco ran pretty rough - jerking, stalling, etc. After I thoroughly cleaned all rails with a Bright Boy, things worked fine. But that raises a question: I haven't yet added scenery, so I can get to all trackage easily to keep it clean - but how do you keep long stretches of hidden trackage clean enough to maintain reliable operation under DCC?