I used to clean my track somewhat regularly, and then I read a post here where someone said they never cleaned their track.
I have a great car that rolls a roller along the track. I would put denatured alcohol on the rollers, and it would do a great job of it. However, I’d have to open all the windows, and sometimes wear a respirator.
So, I figured I’d give not cleaning a try.
The update is that my trains have run just fine for several years on uncleaned track
I use Atlas nickel/silver track and at first I had to rub the center track rail and unblacken it as trains would stall here and there. Finishing that phase seemed to have been about the same time as when I stopped cleaning the track, and things have been running great ever since
So, go figure.
Alan