Quote: "How...how do you apply it?"
Well, if I have to explain, then, you don't deserve to know.......
Quote: "it looks radioactive so standing near it should be enough"
It's just sanitiser; it's not radioactive. Nothing to worry about. I promise.....
Quote: "With a good script it can do the trick"
That might actually be a funny idea for a game. You need to collect these to keep your brain clean and void of zombie infection!