I used to live in the small apartment in an old building. The windows, although new, were super drafty and the place was hard to heat. That winter I decided to plastic over the windows to hopefully help with heating costs. A guy I knew came over and helped me put them up. However he had pretty bad BO and when we put up the plastic it trapped the smell inside. So when I took it down that spring, it released the stink back into the apartment and the whole place reeked for days. Lesson learned.