Opposite the wiper arm and at the rear of the wiper unit (viewed with a dental mirror) I can see three phillips headed screws.<br> Two close to the corners and the third (smaller than the other two) in the middle. My hope is that removal of these screws will enable me to take the cover off the unit and introduce some fresh lubrication. I have made up a small offset screwdiver and I am able to successfully undo the screws. I am afraid to remove them totally in case I am barking up the wrong tree. Anyone been here before me.<br> Regards,<br> Dave<br>