D A M Hangar and Toolbox Essentials

Question
How does D A M protect my windows from dust and dirt scratches while cleaning?
Why do the D A M window cleaner instructions say to use my hand to scrub the window?
Why not use paper towels on my aircraft windshield? They seem to work great!
Is D A M window cleaner toxic?
Does D A M window cleaner have anything in it that will hurt my windows?
What is the best cloth to use on an aircraft window?