Step 2: Clean the bearing using some sort of solvent. Common solvents include isopropyl alcohol (any strength), acetone, brake cleaner, or paint thinner. I've seen people use WD-40, but if you choose to use it, make sure you clean all of it out using another solvent. WD-40 is not a cleaner nor a lubricant, and if you don't get it all out of the bearing, the residual WD-40 will attract dust and gunk up your bearing. Trust me, I'm a chemist. ;) If your bearing came lubricated, you want to get rid of all that lube. Get a little glass dish/cup, pour some solvent in it, and soak your bearing. Swoosh it around, spin the bearing, and just work it so the solvent can get inside the bearing and get all the crap out. You may need to repeat this several times. If you have a plastic spinner body, only use isopropyl alcohol to clean your bearing because almost all of the other solvents will melt the plastic! You can get around this by removing the bearing from the plastic body before you start cleaning it, but some people may not feel comfortable removing the bearing. Although pure ABS plastic is not affected by isopropyl alcohol, ABS filaments that are used in 3D printing have a small amount of sytrene in them, and styrene is affected by isopropyl alcohol. Most ABS filaments have less than 1% sytrene content, so while your spinner isn't going to fall apart, some of you may feel more comfortable applying isopropyl alcohol to the bearing only, especially if you plan to clean it regularly. Spinners made with a lower purity ABS filament could possibly experience more weakening after repeated exposure to isopropyl alcohol, but this also could possibly be related to the structural integrity of lower purity ABS plastic. You can also clean the bearing by using hot soapy water, but make sure you get all the water out of the bearing.