Tom, as Glen pointed out, you can pull the switch right out. It seems it is only held by friction in there. But, contrary to what you may hear, the switch IS serviceable. If you are out of warranty and are looking and over $100 replacement cost, try CAREFULLY opening up the unit once you have it out of the door (it does open). I had a problem with right rear window doing exactly what you describe: down ok, up no go. At least I could raise the rear window using its own switch in the rear door. Anyway, I opened the maser switch up and worked the contacts a little. I expected to see some carbon from sparking, but saw nothing of the sort. In fact I saw nothing that would prevent the switch from working. So, I put it back together and, alas, it has started to work again and hasn't failed ever since. Go figure. The job is very delicate, though and if you are under warranty, have the dealer take care of it, otherwise, give it a whirl.

Good luck.