So, back in the good old days before tree huggers took over the planet we could get screen wash which actually worked. Nowadays I can't seem to find anything which will cut through the road film.

What do you chaps use?

I use some stuff I got from Lidl - I got it because it's good for conditions down to -40 or something like that - having had my washer jets freeze once whilst skiing - and therefore regular steps to put water onto the screen - I now get the lowest temperature rating I can find.

It seems to work pretty well.

I've just used the last of it, so need to go hunting for more.

It was recommended on this thread

--75c sounds pretty cold to me.
Buy it at weekend, 25% off code.

Click image to enlarge

Autoglym "Ultimate Screenwash" for me. Cleans fine and can be diluted to suit temperature. I thought the nozzles were heated and so should not freeze, and have not known that to happen. I have had screenwash freeze when skimmed into a thin film across the screen by the wipers, in colder winters (below -10) indicating that a more concentrated mix was required. Only Range Rovers since 1988

I bought a batch of this a long while back (http://www.ebay.co.uk/p/Genuine-Mercedes-Benz-X6-Windscreen-Washer-Fluid-1-Ltr-Bottles/1214149087) and diluted to suit into a large container with a tap.....it was a considerably less than that price as well.

No squeaks, no film or smearing; it just cleans....doesn't smell bad either. When I run out in about 4-5 years time I will replace with whatever good quality stuff I can find.