I apparently have the window streak thing. For those with it, what's the fix? Clean something? Ignore & wait for it to go away? It's about an inch wide - primarily on the passenger side, but to a lesser degree on driver's. It's almost like there's something sticky down inside the door that's smearing onto the glass.

 

The factory overgreased a guide. If you don't want to take the door panel off yourself and clean whatever it is then take it to the dealer. It will not go away.