Plain old Blue Stuff, good to -9800° C, year round.
No Overpriced, leave gunk on the windshield and crap out the sprayer Rain-X , for me.
No other, latest & greatest gimmcky Carp either.
It's Windshield Washer Fluid.
No Reason to re-invent the Wheel,
nor pay someone, who claims, they've re-invented the Wheel.
But, in the end, as with each and everyone of us all, you do you.
Just know, the Cool Dads think you Rain-X users are goofy looking with your ball caps turn backwards & your pants h anging below your knee's.
and,
STAY OFF M Y DARNED LAWN !!!!!
LOL
hehehehe