Id say clean up that bumper really well. Maybe take the entire bumper off, wash it throughly, along with your Jeep, then take it in and have the dealership "demonstrated" peroper removal of the bumper end cap feature. If you are up for it. One of my bolts was so crosss threaded you could see that it was crooked before removal. So you may be able to just look at it. I'm just curious how widespread this bumper thing is.