There is a hinged cap where it is attached to the car.
Lift that and you will see a nut.
Undo the nut and remove.
When fitting new one, bend until in position you would have it when cleaning screen so that it slides of the spindle evenly.
Want me to take a couple of photos tomorrow showing exactly how to do it?
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Aye, I think i'll be taking a gander at the photos too please.
![Camera :camera:](./images/smilies/camera.gif)