What works on a touchscreen depends entirely on what type of screen you’re using. Most smartphones and tablets use capacitive touchscreens, which only respond to electrically conductive materials like your skin or metal. But other screen types, like resistive and infrared, are far less picky. Here’s what works, what doesn’t, and why.
Why Your Finger Works
Capacitive touchscreens, the kind on virtually every modern phone and tablet, detect touch by sensing the tiny electrical charge your body carries. Your skin is conductive, and your body holds roughly 100 picofarads of electrical capacitance. When your fingertip gets close to the screen, it disrupts the screen’s electrical field at that exact spot, and the device registers a touch. No pressure needed.
This is also why wet fingers cause problems. Water conducts electricity, so even a small drop of sweat or rain can create a false touch signal. The screen treats moisture the same way it treats a fingertip, which is why your phone sometimes goes haywire in the rain or after a workout.
Metals and Conductive Materials
Any conductive material that connects to your body’s electrical charge can trigger a capacitive screen. If you’re holding a metal wrench, the end of it will register as a touch because the metal conducts your body’s charge through to the screen. Copper, aluminum, stainless steel, and silver all work for the same reason.
This principle is what makes capacitive styluses work. Most are built with a conductive tip (often copper or a specialized conductive coating) connected to a body that transfers your hand’s charge to the screen. The key requirement is an unbroken conductive path from your skin to the stylus tip. A metal pen with a plastic grip that insulates your hand from the tip won’t work, because the electrical chain is broken.
What Doesn’t Work on Capacitive Screens
Non-conductive materials are invisible to capacitive screens. Plastic, wood, rubber, fabric, and regular glass won’t register no matter how hard you press. A plastic-handled screwdriver, a pencil eraser, or a cotton-gloved fingertip will do nothing. The screen simply can’t detect them because they don’t conduct electricity.
This is the main frustration people run into during cold weather. Standard winter gloves made of wool, fleece, or knit fabric insulate your fingers from the screen entirely. Thick dishwashing gloves and most work gloves have the same problem.
Gloves That Work on Touchscreens
Touchscreen-compatible gloves use conductive fibers woven into the fingertips, typically silver-coated thread or stainless steel fibers. These materials conduct your body’s charge through the fabric to the screen surface, mimicking bare skin contact.
Disposable gloves are a mixed bag. Nitrile gloves are among the best for touchscreen use because they’re thin enough and sometimes contain carbon black, a semi-conductive additive that helps pass a signal through. Many black-coated nitrile gloves work particularly well for this reason. Latex gloves can also work with both capacitive and resistive screens thanks to their extreme thinness and flexibility. Vinyl gloves tend to be too thick and rigid to reliably trigger capacitive screens.
DIY Stylus Options
You can make a functional capacitive stylus from household materials, but the trick is maintaining that conductive path to your skin. Wrapping aluminum foil or copper tape around a pencil works, as long as the foil extends down to where your hand grips it. Without that skin-to-tip connection, even the most conductive material won’t register.
Conductive foam (the kind that comes in packaging for computer components like graphics cards) also works when rolled tightly and connected to a piece of copper wire that touches your hand. Copper tape is a popular option because it sticks flat to surfaces and stays conductive even when it tarnishes. Aluminum tape is easier to find but slightly less reliable because aluminum oxide, the layer that forms on its surface, acts as an insulator.
A common failure point with homemade styluses is the tip. Even if the shaft is conductive, a plastic or rubber tip will block the signal completely. The very end that touches the screen must be conductive and must have an unbroken electrical link back to your body.
Resistive Screens Accept Anything
Resistive touchscreens work on a completely different principle. They respond to physical pressure, not electrical signals. When you press the screen, you push two thin conductive layers into contact with each other, completing a circuit at that point. The screen doesn’t care what’s doing the pressing.
This means anything firm enough to apply pressure works: a fingernail, a plastic stylus, a pen cap, a gloved finger, even a credit card edge. You’ll find resistive screens on ATMs, grocery store checkout pads, some GPS units, and many industrial devices. They require noticeable force compared to capacitive screens, which is why tapping them lightly often doesn’t register.
Infrared Screens Work With Nearly Everything
Infrared touchscreens use a frame of invisible light beams crisscrossing the display surface. When any object breaks those beams, the system calculates where the interruption happened and registers a touch. There’s no need for conductivity or pressure.
This makes infrared screens the most material-agnostic option. Gloved fingers, pens, styluses, wooden dowels, or virtually any solid object will work. You’ll find infrared touch technology on large interactive displays, some kiosk systems, and commercial signage where users might be wearing gloves or using tools.
Quick Reference by Screen Type
- Capacitive (phones, tablets): bare skin, metal objects touching your skin, conductive styluses, touchscreen gloves, thin nitrile or latex gloves
- Resistive (ATMs, checkout pads): anything that applies pressure, including fingernails, plastic styluses, pen caps, gloved fingers, and credit cards
- Infrared (large displays, kiosks): virtually any solid object, including gloved hands, pens, and non-conductive tools
If you’re trying to use a phone or tablet specifically, the rule is simple: the material touching the screen needs to be conductive and electrically connected to your body. Metal, conductive fabric, thin latex or nitrile, and specialized styluses all clear that bar. Everything else requires a different type of screen to work.