But, for the rest of us, here's what else you need! I highly recommend Tri-Flow Superior Lubricant. You can pick it up at most hardware stores.
I like Tri-Flow because the spray nozzle makes it super easy to use, and Tri-Flow is designed to not leave any residue behind. do not, I repeat DO NOT use WD-40, or anything like it! WD-40, and other cheaper lubricants leave behind a film that actually collects dirt and dust. I used WD-40 on my very first set of skateboard bearings, long ago before I knew better, and they were dead in a month... The key is to clean your bearings with a lubricant made for it - you want the bearings lubed up, but you don't want any sticky film or residue left behind.
For Tri-Flow, make sure you shake it well before using it.
