I was trying to come up with a good track cleaning design and here it is. It uses a freight car (boxcar or tall covered ones best), a cleaning cloth, small piece of wood or similar and nails/screws. To use it you simply wet the pad with your preferred cleaner and off you go and it can easily be added to a train.

BuildingSorry no photos) To start out you find a good sized base and drill holes in your car base to line up with that. Through those holes you place screws and into the wood. Mounting the cloth can be done in many ways and two are shown.

Use:

One method using tape on the sides to mount the cloth.

A lower quality picture but this method uses poking the cloth through the nail for a rounded edge

A side view

Video Coming Soon