window gasket

Hi to all, Recently, I found out that the rear seats were wet. I tried to figure out what was the problem, but I'm not sure if the water comes from the rear window or from the antenna. The glass of the rear window seems to be fine; I mean, there are no scratches, and it is not chipped...

I was going to get my windows tinted when I noticed an issue with one of the window gaskets. Hadn't noticed it before and probably never would have if I hadn't examined it closely. Details: Driver side door, towards the from of the door (near A pillar), where the little black plastic triangle...