Wing Window Vibration (from sterio) ?

[PHOENIX]

I guess Im pretty lucky because the only things that make noise (rattle) when the sterio is pumping is the wing window (driver only, atleast that I can hear ) and the door windows. The door windows are not an issue because I need new channel all the wa around except for the very bottom. I kow this will fix that problem.
I notice that the little pin in the wing window (upper pin/pivot point) is what is causing this rattle sound. If I put my finger on the pin, ever so slightly, the rattle stops. Anyone else had this problem? What can I do to fix this problem? Ohh yeah, it only does it when the wing window is open, I dont seem to notice it when its closed.

thanks!