Cleaning a Retina Display

I'm posting the feedback I gave to Apple concerning this page. As to the water and the actual cleaning, I've never used water before, only cleaning solution. Room temp tap water would be the obvious choice, as that's the temp of the cleaning solution, but they should post what's best to use, not only what we shouldn't use. And I've always cleaned horizontally, vertically, and in circles. My displays appear to be flawless so apparently I've been doing it right. But it would be good to know for sure.

Feedback:

"There are posts on here from 2013 asking how to clean displays. You've (Apple) not updated this page in years. The continued issue is that this page gives vague/incomplete instructions.

"To clean the screen on your MacBook, MacBook Pro, or MacBook Air, first shut down the computer and unplug the power adapter. Dampen a soft, lint-free cloth with water only, then use it to clean the computer's screen."

There are 2 crucial omissions in that incomplete instruction.

1) There are many types of water: seltzer, soda, distilled, tap, purified, hard, soft, boiling, ice-cold, salt, etc... what's the point of giving instructions if you omit vital information?

2) Just get the cloth damp and clean it right (with proper water of course)? So do I rub the display lightly or with some force, horizontally or vertically, in circles, dabs, etc...? Or do I lay the cloth on the screen and wait until is soaks up all the dirt?

This could be fixed in a matter of a couple minutes."