Tried to clean my windshield with some commercial product, used paper towels (at first); Windex with crumpled newspaper didn't help. It's one smeared-mess, like greasy even. Maybe the 110-plus heat here doesn't help. HELP!

Try BonAmi.

vingear and water and a paper towel.

If very greasy, try cleaning it with some coke ( the drink, not the drug)

Also they make some glass polish items that do great