If yours are *not* frameless, hereís youtube video that RV Education 101 did last year on pulling and resealing a window which may help.
While I havenít had a reason to pull out one of the frameless windows myself, I *think* they work exactly the same way, just the glass is adhered to the surface of the frame instead of inset into the frame. So they should work the exact same way, just be a little harder to put the extra sealant across the top/front of the frame since the window gets in the way.
My driver window was leaking when I received my unit and my dealer was beyond obtuse trying to fix it. When I finally took matters into my own hands to avoid any further damage to my rig, I found there was no sealant across the top and front of the window frame like there was on the passenger side. $0.50 of sealant solved the problem that three trips to my dealer (as well as 18 hours of my time and $150 in gas) couldnít.