qsl usually along the lines of a lint-free dry cloth (you do read the owners manual), and maybe a damp cloth for stubborn gunk
I selectively read owners' manuals but as far as this ^^ what you said, I think the vagueness is what prompted my question. Your reasoning regarding this eyeglass surface (bruce also said that) translating to screen is spot on.
Thanks everybody for indulging a silly question. I always knew what not to do (sandpaper, soda, hammer) but never knew what was 'right' to do.
Not one person including me has said "I saw where this left a patch in the upper left" or "it definitely left visible scratches." That's way cool to me.
edit: I'll stick with soft cloth and vinegar/water.