[yhandor]

Yes replace the switch, I have had this happen before and to a buddies cavalier too. Either you spilled something in it, or what happens is the plastic ends wear down so they dont give enough pressure to press the metal connectors together when you push the button to make it go up. Usually you can put the window down, but not back up like you said, get a switch, try eBay for one, I think I saw one on there yesterday, they are hard to come by. Especially 4 door power window switch.