Windex exterior window washer

Decided to try the windex outdoor window washing kit. It is just as awesome as I had hoped. I washed all my backyard windows in about 5 minutes and they look better than I have ever cleaned them. I was worried about our hard water, but it didn't seem to ruin them at all.
Now I've gotta wash the rest, but they have screens on them. Guess we need to take them off before washing. Ugh.
There's a coupon with the link above that gives you $2.50 off the kit. Well worth the money.