Smartphones, laptops, digital cameras and other technological products have become a ubiquitous part of our daily lives. But unlike clothes, you can't toss them into a washing machine to keep them clean. For products that have a touch screen, the simplest way to kill germs and bacteria on them is to freeze them. Just place the device in a freezer bag and into a freezer for one hour. Then let it come back up to room temperature before using it again. The cold temperature eradicates germs and doesn't interfere with the touch-sensitive screens.