Attracting debris? You mean because of the WD40? Well, WD40 is not particularly sticky, and the gearboxes are very well shielded from the outside. Unlike the digi-q cars, the tanks were not designed to be taken apart by the end user. So no, it's not attracting carpet fuzzies and lint any more than it used to be. Though it does sorta smell like WD40, but it's gradually fading
I imagine a little bit of grease might work too; maybe baby powder would do the trick as well, but I don't think it would solve the problem for as long because there's nothing keeping it on the gears. You might use a toothpik and some WD40, to keep it from getting everywhere. Put a little on, run the gears a bit, put a little more on, etc.
I have more pics if anyone would like them (and higher res), but they don't really show anything more than this one does. I added arrows to highlight the gearboxes and the strange turret gear hole.