The real culprit is actually the dust and sand in our air. Among these tiny particles, it is inevitable that there is a substance with a Mohs hardness higher than that of the screen of the touch POS machine. Once it sticks to the screen, it will leave a trace when it is lightly stroked.
Therefore, cleaning the screen with a cleaning agent at regular intervals can effectively prevent the wear of the fine sand. If there is dust on the screen of your POS, do not wipe it with your hands. Use a wet tissue to gently stick the screen until the dust disappears. This way the probability of scratching the screen of the mobile phone will be much lower.
Now you friends know how to protect the phone screen.