i have a 57 plate GT DCi and last month when we started with the very cold nights and days i didnt use my washers (back in November!) until we had a few days of thaw in December.
i tried to use the sprayers, but nothing came out, just made the screen worse (it was and had been 6 degrees when i tried this!)
this went on for a few days, i checked i had screenwash too in between each day when i tried.
the freezing temps came back so i didnt bother trying them, and then again a thaw for a couple of days, early / mid December tried again, nothing.
so i went back to the dealer where i got it from, and they are really good with me, but they had it an hour and said it was just frozen? so i was a bit puzzled as at this point it had probably been frozen 2 weeks?
they ran hot water through (dont know how, as it was full of screenwash when i took it in!)
the next day it was fine (again a +5 degree day)
now i have the same problem, it isnt as cold now here ben +3,4,5,6 the past few days but the spray just wont work at all

its really annoying me now, as my other car that has been stood for weeks works fine! and i think that only has water in and not screenwash! (lexus Is200)
i am getting to the end of my tether with it now, and just wondering if anyone has the same problem or any advice as to what it could be as i refuse to believe that this is just frozen! its a joke, nearly crashed on the motorway as i cant see a damn thing!
sorry for the long post but hopefully someone can help
regards
Sean