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 front wiper blade, pull the arm away from the screen, squeeze together the sides and pivot the cover upwards.
Press apart the clips and slide the blade from the arm.
To remove a rear wiper blade, pull the arm away from the screen, use a screwdriver to depress the tab, and slide the blade from the arm.