Is there a no return valve in the stem of the rear wiper mechanism that feeds to the elbow below the jet? Mine was blocked so I started at the bottle and checked the pump which was fine and then went to the back and found a blockage. Using pipe cleaners from above and below they came back out with a lot of rust on them, it looked like it had solidified. WD40 and a lot of wiggling around eventually loosened it and then blowing it through it went pop and cleared. Now working fine but I suspect it may happen again. Also when popping off the lower elbow I damaged one of the wings / clips so I guess it will leak eventually. Does anyone know the correct sequence for refitting the boot trim as that was a bit of a trial?

I’ve had and, like many others, continue to have this issue occasionally. I really couldn’t contemplate dismantling (and possibly damaging) the hatch trim to get at the pipework so on the advice of my service specialist, I now use a piece of thin welding rod and that always unblocks it. It’s a useless design IMO and one used on many VAG products.

Thanks, I tried wire but what was in the elbow was solid and must have been there for a long time. Now it is running I think a pipe cleaner from above will sort it. I removed the trim in 5 minutes without issue but it did take 30 to replace!!

Yeah, that's where it always blocks. I've tried using a cut-down cable tie and a pipe cleaner in the past but neither of those worked in my case. I really don't get why they couldn't use a 90 degree curved piece.