Interesting, we have a 2005 camper and there are slots in the tracks and slots in the fixed front window to allow condensation to weep out. You will find that simply breathing when external temperature is 45 degrees or less will cause almost all windows to have major condensation when you awake. I prefer the option we have where the condensation makes its way outside but not staying in the track and finding a path into the wall is much worse. Better down the inside and staining/pm than rotting. Jmho
