Windshield Washer Mix
1 gallon of common tap water
1 T. common hand dish soap
1/2 cup household ammonia
a few drops of food coloring (keeps my kids on alert not to touch it)
When the weather is below freezing add 1 cup isopropyl alcohol combine and shake gently before pouring into wiper/washer reservoir.
This blend works much better than the store-bought counterpart.