[hypoxia]

I think I came across the reason the moveable flush windows lose their seal and fog.  Auto Glass Boss resealed all of my glass.  A year later I had them clean up some sealant that had come out.  It was mentioned that it looked like the windows that open were beginning to do the same thing.  After some discussion I realized there are two problems.  First, the sealant Hehr uses is inferior which affects the fixed as well as the moveable (opening) dual pane glass.  Second is the long term problem even after it is repaired with a quality sealant.  The foam that seals the moveable panels get pushed in and loses its resiliency.  Then you have to really crank down to tighten the windows so they don't flap around while driving.  That causes the outer glass pane to contact the rubber bushings and push the outer pane out from the inner pane thus pushing it away from the sealant.  See my photo.