Smoke and Cleaning Fluid.
NEW IN THE BOTTLE This is a four ounce bottle of Aristo-Craft Smoke Fluid/Track Cleaner. Keep your track clean and your engines running smoothly with Crest Track Cleaner Fluid. As everyone knows, dirt often builds up on your track, as well as your engines wheels, reducing conductivity and affecting the performance of your engines. Crest's Track Cleaner Fluid cuts through that dirt, restoring electrical current to your locomotive and other electrical pickup points.