Why Does My Smartphone Not Detect My Finger Sometimes?
If your fingers are too dry or calloused, your smartphone’s screen can’t detect them. Moisturizing may help, and you can turn up the touch-screen sensitivity on some phones.
Frustrated that your phone screen doesn’t register your finger consistently? Here’s why and what you can do about it.
How Do Smartphone Screens Work?
To understand why your smartphone isn’t correctly detecting your fingers, it helps to first understand how phone screens work.
Modern smartphones (as well as tablets, smart displays, and the majority of touch-screen devices you interact with) have a capacitive screen. Beneath the protective top layer of the screen is a transparent electrode layer.
Your finger is electrically conductive, and when you touch the screen it changes the electrical pattern in the electrode layer. The layer turns the analog action of your finger touching the screen into a digital signal (which is why the layer is sometimes referred to as a “digitizer”).
What’s interesting about capacitive screens, especially the sensitive ones in smartphones, is that you don’t technically have to touch the screen to activate the digitizer—they’re just calibrated that…
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