Check out this cool little train car I found for n scale tracks that literally cleans the tracks for you as the train pulls it along:
http://http://www.atlasrr.com/NFreight/ntrackcleaningcar.htm
It's probably only not worth geting for small layouts (unless they have tunnels) but still it is pretty cool.
http://http://www.atlasrr.com/NFreight/ntrackcleaningcar.htm
It's probably only not worth geting for small layouts (unless they have tunnels) but still it is pretty cool.