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?