Check the condition of the wiper blades; if they are cracked or show any signs of deterioration, or if the glass swept area is smeared, renew them. Wiper blades should be renewed annually.
To remove a windscreen wiper blade, pull the arm fully away from the screen until it locks. Swivel the blade through 90º, then press the two catches on the wiper blade and remove the blade. Don’t forget to check the tailgate wiper blade as well which is removed in a similar way.