Originally Posted by TreeSemdyZee

Actually, you're supposed to hold the button in the down position for a few seconds (you'll hear a click). Then close the window and hold in the up position. Only go to the first click. Don't go to the auto position on the switch. If this doesn't work, try a full reset. Hold the button in the down position for twenty seconds, then close the window and hold for another twenty. The most important is to not put the button to the auto position.
I did it a gazillion times this summer the resets always worked.