I have been in this house for a few years and am at my end with these windows. It was built in 1989. They are double pane with aluminum frame. When the temp outside hits 35ish or less, water forms on the inside aluminum frame, enough to drip. I have sealed everything I can on the outside and in with no luck. The house inside has low humidity and no water forms on the glass, just strictly the bottom frame and middle and if its cold enough, the whole perimiter. Ideas, fixes, cheap fixes, I dont have $$ for new windows for a few years.