The problem is, that -40º fluid sits in the nozzles overnight,
> evaporating off the methanol fraction. Minus the alcohol, washer fluid
> is just water and detergent.
>
> And guess what water does at -40º? Nozzles /can/ and /do/ freeze up.
I'm curious: is there any danger of the windshield cracking because of the great disparity in temperatures?