zippo fluid dries quick, something like alchohol. and no problems of staining the track too...

i suggest trying out the 9mm bearings, theyre cheap and prettty fast. not to mention that u can 'upgrade' the bearings by fitting a 520 bearing inside the 9mm.

maybe your HDpro is dying out on u, change to a new one and test again.

in other words, run the bearings dry. when u keeping the car, oil the bearing so it doesnt rust. tq tq