For an issue that can potentially cause the wheels to fall off, I'm having a ridiculously hard time finding out how to grease the ball joints. (it probably doesn't help that I've never actually done it myself before.) A friend showed me how to do it on his but that was a few months ago and hell if I can find the filler on my lower ball joint. Do I need to get the needle attachment and go in between the rubber and the metal? I'm afraid of accidentally ripping something.