One of my patients has an absolutely gorgeous home. She and her husband work very hard to keep it immaculate. Their home has many windows on which she refuses to allow streaks to be visible. After searching a long time she found this following home-made formula that makes absolutely streak-free windows with the correct application and effort.

Streak-Free Window Cleaner

2 TBSP non-sudsing ammonia
1 TBSP Dish Wash Hand Detergent
1 Pint Rubbing Alcohol
1 Gallon of Water

Combine and store in well-marked bottle. You may use as pump spray.

I,ve been using a gallon of water with 1/2 cup vinegar for years. I'll have to try this one. Could be better.