My slide-to-unlock section of my iphone is completely unresponsive to touch, except for the very occasional time the slider will move. I've seen many others with this problem online, and it seems a lot of them alter the sensitivity of the touch screen to solve it. They seem to put alter a general.plist or touch.plist file of some sort so that they make the screen more sensitive. I have NO idea what this means. Could anyone put into simple terms how I would go about making my iphone more sensitive to touch? Thanks for any help!