A light oil spray is the perfect solvent for cleaning dirt that can build up on car and engine wheels, on track rails, and on center-rail electrical pickups. Try using a cotton swab soaked with such a spray for the wheels, and a cloth for the rails. If there is an excessive amount of buildup, try using a utility knife to first scrape off the dirt, then follow up with the oil spray.
For rusted rails, try removing the layers of rust with sandpaper or a non-metallic scouring pad (never use steel wool). For proper operation, it is crucial to keep the top surfaces of the rails free of dirt, oxide, and rust. Tiny particles can often stick to the rails and can then be picked up by a toy locomotive, which can cause damage to the locomotive. Try wiping the rail surfaces clean with a soft cloth after use. For tough grimy spots, try using a hard eraser.
In addition, be sure to check that each section's steel pins are tightly in place; if needed, crimp the track around the pin with pliers for a tighter fit. Make a habit of closely monitoring your train set. A little cleaning and lubricating will keep it looking good and running smoothly for years.
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