What's wrong with making my own windshield/windscreen wiper/washer fluid? What do I risk if I try it?
The last time I bought wiper fluid, it was $4/gallon. I don't want to spend $4, and I don't want the leftover 3/4 gallon of wiper fluid kicking around my apartment until I run out of wiper fluid three more times.
My owner's manual, and every other published reference I've seen, warn of the dire and dreadful consequences of using anything but commerically formulated wiper fluid; but they don't say what might happen.
So, if I fill my wiper fluid resevoir with water mixed with a bit of denatured ethanol and a hint of household cleaner, what might happen? Will the wipers cease to work? Will my car explode? Will the earth go spinning off its axis and wind up having to hang out with Pluto and the other Trans-Neptunian Objects?