Interesting. I guess maybe I use too much ... what does this detailing guy do for the car glass? Windex also? That is what I did the day we had that meet in Pleasanton and if you look at those pictures you took, you can see the streaks!
The VK hides the streaks quite well He also uses Windex for the car glass. The thing is, the outcome of windex all depends on what you use to wipe it.
The way I do my side windows is by washing them with regular water first. Then, without drying them I spray on the windex and squeegie it off right away. Then I spray a light coat of windex on and wipe it down with a paper towel. Usually this will get it streak free. Usually if you do it fast enough you can wipe out the streaks before they dry completely. Another key is to not do it in direct sunlight.
For the front and rear windows, it's squeegie only. No wiping whatsoever. I just squeegie from one side of the window to the other starting from the top and working my way to the bottom.