Hair, fur, and other 'fuzzies' are [unfortunately] very common on most layouts. I spend a lot of time cleaning the track area (track, roadbed, and about 1" to either side), have a good air cleaner in the train room and still get fuzzies. The Bachmann GE 45-ton locomotives have side rods...which love to pick up debris. I find I have to remove the connecting (side) rods on each side of the locomotive occasionally; and, using some of the tools shown above, remove the offending fuzz. This is a time-consuming project that is made easier with a magnifier. [Could it be that, at 75, I can't see as well as I used to? Nah.]
Regards,
Ray
Regards,
Ray