Why is it that screenwash always freezes? So I bought some winter screenwash the other day, rated to -8 it said... Like hell it was, I filled the tank from empty (so I know it wasnt diluted) and as soon as it hit 0 degrees any attempts to use the squirter, it ended up with frozen liquid obscuring my vision on the screen. Not to be thwarted, last week, I bought some screenwash rated to -20. This worked just fine until the temperature reached -7 and then it too turned to ice on contact with the screen. Am I suffering alone with this problem?