Whistling window

[seagulls01]

My drivers window has an annoying whistling at speed. I've noticed that if I push on the window, it stops.

Can you knowledgeable lot tell me what I need to do to stop this..........other than keep pushing the window!!!!!!

[snapdragon]

OPen the window and check the seal at the top, it is a double seal and sometimes the inner one rolls/folds over in places, especially the back corner.