WM3786: One of the reasons I ran Minitrix Fs for so long was the ease of cleaning. Living in a trailer, then a small house, with cats, hair was a problem. In the house, the fireplace and later wood stove, added to the problem. The wipers collected crud, and the gears cat hair, no matter how hard I tried to keep the track clean, as both were in the air.
Pop the body off, push the truck pins out, clean everything, put it back together. For routine cleaning, five minutes was long enough, and they'd run beautifully. Too much hair in the gears, also take the trucks apart, that could bring it up to fifteen. Either way, much simpler than any other locos I could run, in multiple, on a small layout.