See also:

Windshield washer nozzles
The washer jets are automatically heated whenever the ignition is switched on. ...

Switching the wipers on/off and brief wipe
Do not switch on the wipers if frozen Do not switch on the wipers if they are frozen onto the windshield; otherwise, the wiper blades and the windshield wiper motor may be damaged. Switch ...

Screw thread
Push out the cover by pressing on the top edge. ...