I have had my 05 Avalon since February and there has been a annoying rattle coming from the back while I'm driving. After months of trying to figure out what it is I finally found that with somebody sitting in the back seat if they push on the bottom corner of the windshield it stops the rattling noise. I have tried taking a small piece of cardboard and shoving it in the bottom corner and it seems like it will stop the noise for about a day or two then it comes back! Is there a way to tighten the seal on the rear windshield? Thanks!!!