I don't know that. All I was doing was offering up advice that's damn cheap and works good. Once again as usual I get railroaded.
I don't buy into marketing gimmicks if I can help it. If you look at most all automotive glass cleaner, you will see one common ingredient. Alcohol. It works.
I think though, it will be a cold day in hell before I recommend anything else that works that might save a dollar or two.