Re: back window..(water drip)
Had this problem as well.... There is a grommet above the weatherstrip which I've seen a few people have some issues with, myself included.
Open the rear gate.
With the gate fully open, look a few inches above the rubber gasket that appears to be "split."
You'll see some plastic wire guides (black in color) which runs across the rear window.
Take a small trim tool or flat blade screw driver and seperate the halves of the wire guides a few inches from where they meet in the middle. This will give you a lil extra workspace to examine the grommet.
In the middle of the guides, you'll see a few wires which pass through a rubber grommet in the glass.
Check to make sure the grommet is seated fully on the outer edges.
In my case, the grommet had a tear in it. Didn't feel like disconnecting the wiring so I applied some RTV to the outer edges and all is well even after 5 of direct abuse from a pressure washer.