Hi Eric, Just some otherthings I have run into for these problems. 1. Window treatments - blinds, curtains, shades this restricts the warm are from getting to the window pain making the surface colder and thus more apt to have condensation. 2. Heat Register Either not loacted under window or being blocked by furniture or restriced by damper. 3. Window direction Window may have northerly facing making the glass a bit cooler the the other Houses are very dynamic and these problems rarely are a simple one hit solution although I have seen something as simple as a teddy bear against an exterior wall insulate the heat away from the wall which led to mold growth on the wall behind the bear. Carl West Bend, WI