Now you are making me wonder about mine. While searching i read about another member who had the same noise and it ended up being the window channel trim. My channel trim doesn't look really bad and i can kind of lightly place my finger up in the corner against the rubber while driving and it will stop so I assumed it was the weatherstripping. Did you ever try that, stopping the noise with your finger from the inside? Mine seems to come and go now too. I guess i should try the tape, but it didn't seem too bad this morning, other times it's crazy noisy, so Im not sure the tape experiment will work short term. It seemed worse in the winter(like bad all of the time), I wonder if this 90-100* south Ga weather is causing some type of expansion that makes it seal better.