Replacing the rear wiper blade
Your rear wiper blade's service life is affected by the water, dirt and debris that it sweeps off your rear windscreen. The wiper blade needs to be replaced when it shows signs of wear.
Grasp the centre of the wiper arm and lift it up and away from the rear windscreen. You may feel some resistance halfway – this is the lock position. You need to pull the wiper arm past the lock position so that it doesn't fall back onto the windscreen.
Put your thumbs on top of the wiper blade, underneath the wiper arm, and push down on the blade until it loosens and comes away from the wiper arm.
Press the new blade into place until you hear a click.
Check that the blade is firmly attached to the wiper arm.
Fold the arm back down against the windscreen.