I am allready thinking of winter,I have condensation in my coop have put more vents in for this comming winter.I am putting in a new door with a lot of little window panes in it,is there anything I can put on the glass to keep it from iceing up in the wnter?It will be on the south side so the sun can heat the coop up,but I know as soon as the sun goes down the ice will be on the windows.