C70 windows problem. They let wind come through

[eightfifty2x0]

So my C70 has this thing, where when i drive above 60km/h, the wind comes through a spot between the top of the window and the rubber on the body. The previous owner called it "teething" and said that i can be fixed by adjusting the window glass itself.

Can anybody tell me, before i remove the door panel, whether that is the case or whether the rubber on the car body has become weaker? Although something tells me that the window glas is just not "sitting" properly.