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Track joiners work (move relative to each other) and the fretting compounds that build up in the joint are usually oxides that do not conduct. So if the interruption happens on the same rail, it may be isolated. <br />There are two surface problems in the track itself. Tarnish, or sulfite corrosion reduces the power to the motor. Then there is dirt that is possibly burnt by the sparks. The electric spark or the slipping of the wheels burns the oil and other lube products. IMHO, clean the dirt off with rubbing alcohol and poli***he rails with either a mild abrasive or metal polish. I use Masonite pads and clean them with a vinyl eraser. When the engine gets sluggish, clean the wheels that conduct power. Occasionally, clean the tracks and vacuum the track. Keep the room clean. <br />Lindsay <br />
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