I tried GreaseMaster on glass for the first time on the Saturn, and I was amazed by its ability to clean glass. In fact, I'd say it's on par with Windex (although I didn't use it side-by-side in a test, and I haven't used Windex in a long time as I use Sprayway). Complete with streak free shine and all. And that's without wiping it down afterwards with a damp cloth. So, the residue is still on there. When rain water hits it, it just washes away the GreaseMaster, and I couldn't see any streaking or anything when it happened on the Saturn. Here I cleaned a really dusty window on my '93 Mustang. Photo: Ryan King, 2006.
GreaseMaster Application Image Gallery | Image 10 of 33