It looked like I had some water getting in on the back wall. When I extended the bedroom slide I noticed the wall had some bubbly areas that was cold to the touch. I cleaned all the areas on the back off the mh to be caulked with paint thinner. Then caulked both tail lights, all four running lights, the window, and where the ladder bolts to the wall with pro flex clear. I really like pro flex and am hoping I got the water leak. The rear cap seam has already been sealed with eternabond.