This is almost too embarrassing to admit: I first sprayed Pb blaster to clean up the latches and then I sprayed a gel lube to all the latches. I cycled all the doors and it still had the problem. I had to go to Home depot to get a part for my sink and the whole way there the door ajar light stayed on. When I pulled into the parking lot, I turned off the car and then i decided to try it again. I opened and closed the drivers door, again and again. After the fifth time, I noticed a faint sound in the background. I slammed the door shut again, this time a little softer and I heard a slight "boom." I opened the door and closed it again softer still, this time trying to focus on the sound and where in the car it might be coming from. Immediately, i recognized the sound. It was the rear glass hatch. It wasnt closed all the way. I got out of the car, closed the glass, got back into the car, closed the door. No "door ajar" light! Open and close, open and close, open and close. No Light! Gosh, I'm a fricking IDIOT!!!