D A M Hangar and Toolbox Essentials

Question
Is D A M window cleaner toxic?
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?
Does D A M window cleaner have anything in it that will hurt my windows?
Why not use paper towels on my aircraft windshield? They seem to work great!
What is the best cloth to use on an aircraft window?