I was having the same problem many of us have with the windows being very squeeky and noisey when putting the windows up and down. Not it seems that the motor may be going. The other day when i put down my passenger window it had ALOT of trouble going back up, but when I sprayed some WD-40 down the rubber treads its working a little better. WHats wrong with them? Anyone have problems with their windows going up and down? Im taking it into nissan to have them check the motor since it should be covered under my warranty, but they will try to blame it on the tint and say its slowing it down...

 

you need to clean all the dirt out before you lubricate. and WD-40 is bad to use. it collects more dust and makes the problem worse.

do this

How to fix problem of windows rolling up slow and squeaking.
RED - Run a wet rag in the window track then spray whole thing with silicon spray.
BLUE - Wipe inside both rubber pieces with wet rag.