This method requires something like Tri-Flow - something that can spray hard. Using the same technique as before, hose down the bearing inside the wheel. Blast it hard, getting into every crevice.
You're going to want to pat down the bearing inside after you've blasted it, to get the excess lubricant off.
For this quick-fix method, you don't even need to take the wheels off your skateboard. You will only be able to clean the bearings on a very superficial level, but for a fast tune-up, it might be helpful. However, remember to take the time at some point to actually clean your bearings!
Whats Next?Well, you're going to want to put those bearings back in your wheels and put them back on your board! Read How To Replace Skateboard Bearings, and learn the quick and easy way to put those bearings back in your wheels, and put those wheels back on your board. You're almost done!
However, if you spend good money on those bearings, or you just like them and don't want to have to replace them as fast, read the "Best Method" for cleaning and re-lubing your skateboard bearings...