Help! The center windscreen wiper keeps coming loose at its base on my new 2025 Plus Four. Can anyone enlighten me as to the "workings" underneath? Is there a nut that I can't see that has vibrated loose? I tighten the outer nut but after a few trips in the rain, it loosens again and the entire outer mechanism dances around on the bonnet. Its threaded "tube" protrudes much further (higher, more threads exposed) than the other two wipers. Isn't this bending the wipers' connecting bar by drawing it upward more than the other two wipers? The dealer thinks that the dashboard has to be removed to diagnose and fix the ongoing problem. I'll reserve that as my absolute last employed action. I'd appreciate advice or even a parts book illustration so I might better understand what's going on and "creatively" tighten it properly from the exterior. I have an idea that might work but I need to comprehend what's going on underneath before implementing my idea. Thanks guys!
