Originally Posted by
cbrstar
....... and he always tells me I'm too slow

. But he's right especially when it comes to cleaning wheel bearings. You can be too nitpicky/perfectionist.
It simply takes too much time to clean
AND INSPECT bearings vs simply replacing with new. Why gouge the customer with excessive labor charges for a low skill level task? You should have better things to do to make money for the shop.
You can also tell the customer you put in NEW instead of the OLD bearings.