how to clean bearings:
1. get a film canister (the old cylindrical containers used to store film way back when cameras didn't have slots for SD cards)
2. drill a small hole on the cover
3. dump all your bearings in the container and cover
4. with your rc cleaner/brake parts cleaner or whatever solvent you use, insert the straw or nozzle through the hole and spray a liberal amount into the cylinder. fill 1/3 to 1/2 full.
5. with a towel pressed down by your finger against the hole, shake the can like you were making a margarita (accompanying music and dance moves optional).
6. when your tired from the shaking and dancing, stop, drain the fluid and let the bearings out.