Ok so front washers decided not to spray this morning. Back washer ok.
Opened bonnet and located a thin black coloured rubber tube running just inside the engine compartment.
Look for the washer bottle then on the left running along the body work towards the driver, rhd car not sure re lhd, you will find it.
It has a join in the tube .
Removed one section and blew air thro' using foot pump.
Did same with other.
The water in the tank bubbled up so must have a very high concentrate of washer cleaner it.
Hey presto back to full spray.
Now i'm going to run tank down and refill several times with clear water to clean the system