Thanks, but way ahead of you there! In fact, the plastic over the window in my hall actually "billows" in the breeze. Not so bad once it's shrunk with the hairdryer, but a bit disconcerting to watch it while loose. Yes, it did help a lot!

And the plastic wrap keeps the breeze off wet hair in my bedroom.

I kind of would like the basement windows sealed better, as well as the seals around the doors - old and dry foam for the most part. The kitchen door can be a bit breezy too, but some additions last year helped.