Fake Windex
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
I tried this "refill" of my Windex and it's awesome! No streaks & it even smells like the real thing!