I searched using a few different things but did not find this, has anyone seen this problem? My wife rolled down the passenger window to talk to my son, as she brought it back up there was a noise like someone pulling their hand across a balloon - and black goop came up out of the door. I cleaned it off, assuming it had been on the window, unseen before. But once clean, rolled down and back up - same. This is a really sticky black substance. Took crome trim off, and look inside (with window down) - there's a flap of vinyl or similar rolled over at the down by the door handle - which has a long bead of said goop along the top edge (as well as a hole where presumably it attaches to something. As the window goes down, this flap wraps around the wires, and as it comes up - most of the time - it deposits more goop, then lays against the window. I am assuming this is a weather-proofing flap for the door handle - but not certain. Anybody know for sure - so I can describe it in Tesla terms for the service center ??? Any input gratefully received.