Originally Posted by Karvonen's Pro Clean
Ditch the dish soap and get an actual window washing product.Ettore's Squeege Off works great and can be purchases at the big box stores.1 bottle will make about 20 gallons of usable cleaner.
Etorre is good, or Sorbo, but keep the dawn. If its streaking, it might be you went to heavy on the soap. Try a few tablespoons of soap with 3 gallons of cold water.