Drag the window and then pull it towards you to put it down.
The window is now removed.
Clean the window with water without rubbing.
To re-install the window, perform the procedure in reverse. To tighten it:
• First, shake it lightly with your hand until the window no longer moves in the door and then,
• Then tighten by turning the additional screws 3/4 of way around (or even up to one full turn).
Precautions
Be sure to position the window correctly in the door slides.