Daulton Shamel

I drive a 02 z28 with manual Windows. Every morning I get in my car there is about a half of an inch gap the window has dropped over night. While driving I close the window all the way and later on it drops down enough to hear wind coming through. When I wash my car I have to push on my driver side window so I don't get excessive water in the car. Any ideas how to adjust the cable maybe idk.... My weather stripping looks fine. Could it just be my window track ?