I have put the eBay wipers, with the jets built into the blades and they have worked a treat. However recently the passenger side jet has stopped working. I recently got a new windscreen fitted and the chap took the wipers off, could he have dislodged anything underneath? Any ideas before I start dismantling?
Probably a pipe pulled off or a union split under the black plastic panel below the windscreen. If so, water will be spraying out under there whenever you use them so you will see it dripping onto the ground. The panel is just held on with about four screws and some push fittings. Pull it off and have a look. If you have changed to the flat blades, I did that and thought the pipes were long enough but eventually one pulled off - on the wiper arm so clearly visible - so I fitted the extra hoses that had come with the blades.