Glass Science Glass Scrub seems to work fine, but I found it somewhat messy to use.
The directions say to keep the glass water wet and to rinse the residue. I used a spray water bottle and had a tough time rinsing the residue. I did not want to hose down the car. It smeared a fair amount when I tried to remove it, but finally did wipe off. The glass was very clear/clean.
Personally, I prefer DG's NU Glass, which does not require the water and is easier to use.
The directions say to keep the glass water wet and to rinse the residue. I used a spray water bottle and had a tough time rinsing the residue. I did not want to hose down the car. It smeared a fair amount when I tried to remove it, but finally did wipe off. The glass was very clear/clean.
Personally, I prefer DG's NU Glass, which does not require the water and is easier to use.