What to use for washer fluid?

A friend of the family had a recipe to make washer fluid. He owned a service station in Minnesota. That was back when they‘d pump gas for you , checked your oil and washed your windows. The stuff didn’t freeze in the winter.
Don’t have the recipe but I found one that I’m sure it close.

Windshield Washer Fluid Recipe​

  1. In a clean 1-gallon jug, combine the water and methanol (if you do not have access to methanol, you can substitute rubbing alcohol), using the proportions listed in the table above.
  2. For example, if your vehicle will be exposed to temperatures as low as -10 F, choose a mixture of 70% water and 30% methanol. ( you could use cheap vodka too).:D
  3. Add 1 oz of washer fluid concentrate or dishwashing fluid such as Dawn or Joy.
  4. Add food coloring if desired. This step is optional and is mainly as a safety feature so that the fluid is not accidentally used for a different purpose.
  5. Seal the jug and shake lightly to mix (avoid suds). (If it still freezes just add a little more alcohol to it.)
I don’t know of anything that would make it not freeze that wouldn’t mess with the wax.