After getting fed up with my rather pathetic windscreen scooshers, me and the OH finally got round to investigating it last night. Pin in hand, ready to adjust the levels they hit the screen. Turns out there was nothing wrong but the connecting pipe under the bonnet was leaking. There's a white connector and black plastic circlip that just doesn't do the job. 99% of the wash was p*shing out under the car! Obviously you wouldn't be aware of it when you're driving. After considerable fiddling about its now held together satisfactorily with tie wraps! Trip to the dealer at some point for a proper fix......