"Graeme" wrote in message
...

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. A small drop comes through,
but nothing more. Unlikely to be scale as such, as this is a very soft
water area. Any thoughts on what I could soak the jet in, to help? 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. Vinegar,
perhaps?

Given that its likely to be the gel that can form in the
washer bottle, I'd try neat bleach, soak it in a cup of that.