[Oh Haha]

I have used Invisible Glass for many years and was happy with the results. I was in Advance Auto a couple of months ago and saw they have Griot's Garage products.

I bought a can of their aerosol window cleaner and it works better than IG.

The "trick" so to speak is to clean the glass and then buff it with a clean cloth.

I also use Rain-X on the windshield which is awesome as well as my orbital buffer once in a while. After removing the wax from the car body I will go over the windshield. The wax that's on the buff pad is just enough to polish the glass nicely.