Extra Window Insulation?
 

I have done some searching but can't find any topics on this. Am hearing window rattling at the top corner behind my ear. When I wedge my finger in between the window and the seal, it reduces the rattle. I have tried gummy pfledge and it didn't improve the rattle. Am wondering if there are extra felt strips that can be added there?

P.S. there is no more "flex" left on the window so I doubt it can be adjusted any further...

Cheers!

I have the same rattle...