From FakeItFrugal.blogspot.com: Make your own Windex for 27 cents per bottle!
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:
Fake-It Yourself Breakdown:
Fake Windex (Ammonia $0.02, Alcohol $0.25)
Total Fake-It Cost: $0.27
Compare to Real Windex: $3.69
Total Fake-It Savings: $3.42*