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Here's what you need: 1 Empty Windex Spray Bottle 1/8 Cup (1oz) White Ammonia 1/4 Cup (4oz) Isopropyl Rubbing Alcohol 1 Drop Laundry Detergent Water - To Fill The Bottle Isn't it nuts how most of what we're paying for is WATER? Anyway, I tried this "refill" of my Windex and it's awesome! No streaks & it even smells like the real thing! I used a 64 oz bottle of Ammonia and a 16 oz bottle of Rubbing Alcohol that I picked up for $1.00 each at the Dollar Tree. Wait till you see how cheap it is to "fake" your own Windex:
How to make homemade windex and other great tips.