I pulled off the windscreen wiper arms, Bit of a trick to that, as they have a locking tab under the spline, you have to lift the arms, move the tab, then the arms will come off.
Removed the bottom plastic skirt, and there was a pile of leaves twigs and dirt the size of a large birds nest in the Void.
Removed all the gunk.
Will see how it goes in the wet weather.
Tall paul