Depends on what all needs to be cleaned off of the track. If you just mean that you want to keep the track clean for racing, I have used Windex on a clean rag to wipe down the surface. Windex dries very fast due to it's alcohol base, and also wipes up oil streaks, or spills due to the alcohol as well.
If your track needs major cleaning, due to rust, or even mild corosion, use of steel wool will work pretty well on the rust. Then wipe down the track with WD-40, or Tigers Milk, and THEN wipe the track down with Windex. For the mild corosion, either use a track eraser, like the Rail Roaders do on their train tracks, or pull out a strong magnet car and run it around the course two or three laps. Usually does it for me every time.