Then I turned my attention to the rear door windows. Both of them were really squeaky and difficult to roll up and down. I didn't know what I was going to find, but figured it would be cleaning and lubricating.
So for anyone looking up how to fix squeaky windows on a 1996 Geo Prizm, this is how I did it:
First, unscrew the two screws holding on the armrest.
Then, you need to remove the window crank. This isn't obvious at all unless you have the manual or otherwise know the trick. You take a rag and wedge it up under the crank, kind of tugging back and forth. This loosens a retaining clip just enough so you can pull it out with a pair of needle nose pliers or the tip of a screwdriver.
This is what you're pulling out so you can get the crank handle off.
Then you have to get the interior door handle out of the way. Unscrew the single screw holding it in place, and then pull it towards the front of the car about half an inch. That will allow the tabs to release from the door and it will come loose.
Use a putty knife to pop the panel off the door. Just slip the knife in the gap between the door and panel, and slide it over to where it's right next to a fastener clip and pull the panel away from the door to pop that clip free. Do that for each clip, until the panel is really loose and just being held on by the interior door handle. Twist the door handle a little and push it through the hole in the panel as you pull the panel free.
Pull the panel free, and you'll see the plastic water barrier covering everything.
Carefully remove it. I found that sometimes it just pulled easily free, and other times I had to cut at the adhesive with a razor blade. I cut through the plastic barrier around the two points that support the armrest, and I also cut a larger slot so I could slide it off past the interior door handle.
