We bought a 2012 26.5 HT Fifth Wheel last year and love it. The previous owner told us about a leak but I had it looked at by a certified rv guy and it was ok. Had to repair a small place on the back wall but no biggie. We notice now if it rains water pools up in the window sill on the back window. Anyone ever experiences this and have a fix? Update: Just noticed the water seems to be coming in the bottom side of the window itself between the glass and the rubber seal. It just oozes a little but over time it builds up.