Indeed the 0000 steel wool works, I first tried it on my old Ford Ranger's cracked windshield, thinking if it damaged it I was not out anything, but it worked, so I used it on my WBO View to remove those white spots from dripping from the cab over, in addition to microscopic pieces of bug debris that you simply cannot get off with normal cleaners and wiping.
I first saw it on Youtube on the RVGeeks channel,
https://youtu.be/D05vX-G9iV4Charles
2007 Winnebago View 523H on a 2006 Dodge (Daimler-Chrysler aka Mercedes) Sprinter 3500 chassis (T1N). Bought Sept 2015 with 18K miles on it, Prog Ind HW30C, Prog Dymanics PD4645, Coleman Chill Grille, PML/Yourcovers.com deep alum trans pan, AutoMeter 8558 trans temp gauge, Roadmaster sway bar, Koni Red shocks (front & rear), Fantastic Ultra Breeze hood, added OEM parabolic mirrors and RH aspherical mirror, MB grill conversion.