Living here in the great Northwest (or North-Wet as we often call it), I too experience some moisture/condensation on the backside of the display window of my AmeriQue. Since it is not in the electronics themselves - only on the back of the window, I don't worry about it. After the unit is run a little while each time and surfaces warm up, it goes away. Depending on the outside temperature and humidity here, I can see the moisture each time it is used or just occasionally. The back panel of the unit is not sealed airtight to it, so moisture/humidity can find its way in there. It seems to evaporate out when unit is fired-up. The CS covers are a good investment to otherwise keep things as dry as possible.