On 11/06/2019 11:10, Graeme wrote:

Unbelievably, just discovered, four years after buying a car, that the
rear screen has a washer as well as wiper :-)

Problem is, the jet, which angles the water 90 degrees, is blocked.
Managed to clear a hole with a needle and very fine drill in pin vice,
but not enough to allow a jet of water through.Â* A small drop comes
through, but nothing more.Â* Unlikely to be scale as such, as this is a
very soft water area.Â* Any thoughts on what I could soak the jet in, to
help?Â* Put through the dishwasher last night, which softened the crud,
and currently sitting in a cup of hot water with a dash of washing
powder.Â* Vinegar, perhaps?


If you have a syringe, attach a short section of flexible tubing
to the syringe nozzle and try and back flush the car jet.

If you can get at the rear of the car jet and remove the tubing,
even better because you can isolate the blockage to be car jet
or tubing.