I’m trying to drill some holes in the wall of my 2000s ford econoline, and while it worked in the back, I can’t see to drill through the walls in the middle of the van. I’ve tried self tapping screws, drilling bits which keep snapping, and have verified there’s nothing behind the metal. I’m applying a medium amount of pressure at a low speed, though I’ve tried other variations as well. Why can’t I get through? #lifestyle source