Hey, SR:
Steel wool will scratch glass horribly. Even the Scotchbrite can scratch glass.
Just a note to readers of this thread:
There are a number of folks who know that any abrasives on glass will cause terrible nighttime streaking from scratches. I am referring to the streaks of light caused by headlights from oncoming vehicles. It can get very dangerous.
As far as any waxing/coating of windshields, that too can cause streaking when the wax softens and gets smudged by the wiper blades. Even the Click and Clack (NPR - Car Guys) mentioned that the other day.
There is nothing better than an undamaged glass surface that is free of all coatings. One of the best ways to get that is to clean your windshield with a vinegar and water solution, which will strip all road oils from the windshield. It is not a permanent fix, and requires that you clean it periodically, but it works. Any cheap white distilled vinegar will do. You don't need Balsamic!
I may sound "old school", and thus not as trendily attractive, but the type of blade material is less important than the ability of the armature to produce enough downforce to keep the blade on the glass properly. That is the result of the curvature of the windshield, the design of the wiper blade arm (and how it reacts to wind speeds), and the strength of the spring in the car's wiper arm.
To use a simile: It is like replacing the good tires on your car because the suspension is worn and tired and not keeping the wheels on the road. It ain't gonna do the job!