Why don’t normal gloves work on touch screens?
To understand this, it is first necessary to briefly explain how touchscreens work. Most modern phones and tablets use what is known as a “capacitive” touch screen. This means that there is a network of tiny electrical components called capacitors just beneath the screen, which store electric charge. Human skin conducts (or attracts) electricity, so when your finger is placed on the screen, some of the electrical charge transfers from the screen to your finger (don’t worry, it is a tiny amount!). The phone detects this loss of charge and works out the location of your finger based on how much charge was lost by which capacitor. When you are wearing gloves, the material in the glove acts as an insulator (or barrier) to this flow of electricity, so the device is unable to detect where your finger is.