Fill the bore of the wheel with graphite.
Insert an axle into the wheel bore.
With one hand, firmly grasp the axle and hold the axle horizontal to the ground.
With the other hand, spin the tire gently -- don't drop the axle. Spin the wheel ten times.
Hold the axle with the wheel hanging towards the ground.
Deposit some lube into the gap between the axle and wheel bore.
Tap the wheel gently to help move the lube down into the wheel bore.
Again, spin the wheel 10 times.
Continue this process for five minutes per wheel.
Important - Don't add any more graphite after this point. If you do, you will need to spin the wheels ten times again. Always spin the wheels after adding graphite.
Erase the graphite with a pencil eraser.
Rub the spot with a dab of vegetable oil on a clean rag.
Use a baby wipe.
Spray some "Simple Green" on a clean rag and wipe.
Spray "WD-40" on a clean rag and wipe.
Apply a paste wax or car polish with a clean rag.