The front washers on my C4 aren't working?

Is the washer pump running?
If it is then it could be blocked jets.
Also, from experience, it could be the intake on the screenwash pump is blocked with crud. If clearing the nozzles doesn't help, remove the pump [emptying the screenwash bottle first :-) ] and wash out the intake. My lad's had a dollop of black sludge goo there which was probably microbial or fungus of some king. Urgh.

XXX
March 2016

They are possibly blocked with bits of calcium deposit from hard water - if you push them back down the tubes with a fine wire they will just come back again.

When this happens to me I put some Viakal Limescale remover into the water tank and give it a few days to work.

Good Luck...
March 2016