About a week after I replaced the passenger side window motor, the driver side window started acting up.  The window would go down fine but was very tempermental about going up.  A thump with my hand on the armrest near the switch seemed to help but eventually the window was stuck in the down position.

There are four of these screw trim covers that must be gently pried free in order to remove the armrest, and then the window switch. 

There are more details on removing the door panel here, but only the armrest  needs to come off for removal of the switch.

While it is possible to remove the power window switch with the armrest in place, I don't recommend it. That takes a little too much prying on the switch trim cover, which could cause it to break, as they are prone to do.

Remove the switch and gently pry off the beige cover.

The solder and connections looked good, so I stuck the straw from my can of WD-40 into this tiny slot and drowned the inside of the switch. 

I sprayed until WD-40 was dripping out the other side.  Cleaned things up, reassembled, and the window worked perfectly. 

A quick check can be made of the switch by temporarily reconnecting it to the harness at the door before going to the trouble of a installing the armrest back in place. 

Yeah, unfortunately those are screwdriver gouges in my paint on the door from an angry ex.