I remember driving to Glasgow in a Iveco luton van and the washers froze, and tried to keep going as long as I could. Had a drivers mate with me, and for some weird reason, the wipers were clearing his side, but not mine !!
Anyway, looked around cab, and no water, but bottle of coke, and as screen was getting really bad, ended up driving along at about 60 trying to throw coke over the screen.
Got me to the next services, as dare not drive any longer as thought the coke would get reet sticky