After someone else, like a friend, uses my touch it does not seem to work well afterwards. It does not respond when I use it again. Flicking and scrolling in particular did not work well after a friend used it for about an hour. At other times it does not open an app when I touch the icon. Today tried to use Safari and the pages would not delete and could not scroll them either. Think that maybe other users are trying to push an imaginary button through to the back side rather than just touch.