iPhones and other electronic devices use capacitive touchscreens. Capacitive touchscreens work when mico-currents interact with the screen to create a response. Winter weather presents a problem because wearing gloves blocks the flow of micro-currents and prevents the gadget from working.
Enter the sausage.
Sorth Koreans have discovered that a sausage works quite well as a screen stylus. The practice is so popular, in fact, that small snack sausages have seen a spike in sales. Some users even employ the sausages as drumsticks for the Taiko Drum Master Game.