The Aztec track cleaner car works great. It has (from right to left) a magnet to pick up stray metal pieces, three wipers, and a roller that sits at a slight angle to the track. The middle of the three wipers can be made wet with a cleaner solution. In that case the first wiper takes off the dust from the railheads, the second applies the liquid, and the third dries the railhead. I have found that I don't like using liquid cleaners. A wet railhead is like a magnet for dust. I run the car behind a locomotive to do some dry-cleaning, and use lap pads (see my Track Cleaning article) to do the serious track cleaning.