I keep my GT pretty clean so I just needed to do a quick wash on it as time was of essence on Sunday. I went to one of the self washes and hit it with the pre-soak and then the rinse and decided to try the spot free rinse, even though I didn't believe it was any better than normal water rinsing. WOW, I am impressed to say the least. I didn't dry it by hand and just drove it dry and no spots whatsoever. What do they put in it to keep it from spotting? I handwashed it last week and drove it dry and I had to re-wash, it looked so bad from the spots.