my touch and at least one other user here have an issue where the screen becomes non-responsive and then apps start behaving randomly as if being controlled remotely, e.g. you're watching a movie and suddenly the volume controls appear and the volume starts changing madly - up to full then down to low, then up to 60%, etc. Also if on home page, settings can open and settings start to be changed.
Turn SSH and WiFi off, sounds like your being hacked.