Slim357

When I got my Cherokee I had no issues unlocking my passenger side door. Well about 3 months later the door would unlock with the key or using the manual lock. I played with it for an hour or so and finally got it unlock. It was fine for about a week then did it again so I took the door panel off and sprayed it with I think it was screw loose or something. Has been fine for almost a year and then it started again after I rolled my Jeep on its roof. Its weird I checked to make sure the mechanism is clean and in tact but it still does it randomly. Any ideas? Its an 89' 2dr if that helps any.