I use a caboose from http://mnpinc.com/Home.htm
I run it with a regular run of trains on two huge holiday layouts, built by TWTRAINWORX. The beauty of it is that I can put it on the rails during public operating hours and no one knows its scrubbing away - because it's hidden inside a Lionel caboose.
Nothing beats a hand cleaning, and I use https://www.harborfreight.com/...s-cleaner-62228.html cleans the gunk and improves conductivity and doesn't harm plastic. Spray it on the rag, not the track.
