My daughter's corolla has a rear view mirror (has reading lights built in) that seems to vibrate (when looking into it as I drive the car at
30 mph or so) a bit too much. When I touch it, it seems like the whole assembly is pretty tight but the mirror just vibrates enough to make you eyes dizzy or annoyed if you have to stare into it as you drive.I was looking as the assembly and I don't see any adjustment to tighten it nor to wedge anything. Is there anything I can do to try to tighten it (the mirror portion) just a tad? Is a replacement the only option and if so, do you know the cost for the mirror part or the whole assembly?