Hi ycarry.

Thanks a lot for your suggestion.

Above all for this : "...and remember to gently wipe the screen..."

Regarding the first suggestion (the paperlike),
I first want to practicing with this new
"plastic on glass" drawing experience,
in order to change the way my brain deal with this
new situation.

If I will get too many trouble then I will try to use
a glove also for the left hand in order to
minimize the fingerprint and smudges,
and only if all things go wrong, I will get a product like "paperlike".

I need practice :)

Thanks again for your help.

Ciao!