Actually, I believe the iPhone does have a heat sensitive screen, this is why only fingers or skin can control the screen, not a stylus or fingernail.
I believe you should stay away from forums, and I don't need an internet article to prove that.
Blowing on the iPhone's screen? How ridiculous. If you're going to take the effort to blow on your screen, you might as well touch it.
And the screen isn't heat sensitive. Obviously, you didn't read the article. Stop being stubborn. Your idea is not a good one, and the screen is not heat sensitive. Mmkay?