Biased turkey said:
Another point to take into consideration is the fact that tha Atlas track cleaning car is equiped with a "Rapido" style coupler.So I made an "intermediate" car with a rapido coupler on 1 side and a knuckle coupler on the other side.
I had mine converted to Micro Trains couplers.
I prefer my Centerline track cleaning car. I don't use a bright boy 'cause it may cause scratches in the rail which in turn accumulates dirt.
I also have a metal cleaner/polish cream called Flitz, it works pretty well and leaves a coating on the rails to improve conductivity and resist dirt.
Even contact cleaner (for electrical stuff) on a J-Cloth or paper towel works well.
There are lots of good ways to choose to keep the track clean.
The best one is running the trains.