Hello I have replaced my old aluminum windows with new vinyl ones last summer. Last night when the outside temperature dropped to -5F, I noticed that in addition to regular condensation, the moisture froze on the inside of the window. The ice remains there even if I heat up the living space to about 65F. The outside temperature continues to be around 3F. Would any of you have any idea why it is happening and how to prevent it? Thank you. Please see the pictures for reference.