I've been running slightly dilute RV potable antifreeze with great results. You can drink it, sanitize with it too;
and it is not toxic to breath like methanol based products.
But the time to buy was early Summer when WM was blowing it out for 2 bucks a gallon.
No wiper chatter due to the percentage of propylene glycol in the mix.
My father used to run RV antifreeze in the 18 wheeler in the winter for windshield washer fluid. Even the -30F rain-x fluids would freeze up on the truck. But RV antifreeze never froze up on him.