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.
Repeat steps 3 to 7, two more times.
Finally, spin the wheel 10 times. Don't add any more graphite after this point.