CSI method... how to figure out what a password is after punched in on phone?

[Ashlyn]

My dad set a restriction on my iPhone for no reason at all except that he could. (He blocked me download apps.) I want to download a few apps such as Tumblr, Wattpad, Twitter, etc., which I have had previously. My parents are very controlling... they don't like me on social networks. Its ridiculous. I'm 16.

Anyways, I was planning on asking him to put in the password so I could download a game or something. In my head, I was thinking of making hte screen completely finger-print free, so I could then see, in privacy, where he touched the screen, so then I could see what numbers he might have pressed.

I've hit a wall, here, though. I don't know what I could put on the screen that would make his fingerprints stick. Any help?

[Randy]

Use your money,buy your own phone & program it the way you want as long as you pay the bill.