Stupid Question about rotors!

Ok, I know that when you change your rotors you have to clean them with break cleaner. Here is the stupid question, why? What is the signifigance of doing this? Is it determintal if it is not done?

TIA

Rotor manufacturers put oil on them before shipping them from the factory.Sometimes its hard to tell the oil is even on them.If you dont clean them they can glaze over like a clutch and sometimes the oil will smoke off.Either way its not a big deal just a quick shot of brake cleaner will prevent any problems.

Rotor manufacturers put oil on them before shipping them from the factory.Sometimes its hard to tell the oil is even on them.If you dont clean them they can glaze over like a clutch and sometimes the oil will smoke off.Either way its not a big deal just a quick shot of brake cleaner will prevent any problems.

Thanks a ton! I forgot...LOL and didn't want to have to take them all back off to clean them......Dang, I need to fix my memory.....LOL
:iceslolan:p:runaround: