1. If your fingers sweat after a long time of use, the screen may also be dirty or stained with water. It is recommended to dry your fingers in time, clean the screen regularly, and keep the screen clean and dry;
2. Check that the glove mode is on. Glove mode will improve the sensitivity of the touch screen. If it is not needed, it is recommended to turn off this mode;
3. Check whether the screen film is thick. It is recommended to replace the film with a thickness no more than 0.2mm;
4. Restart the phone. Too many mobile phone running software will cause no response of the touch screen;
5. Restore the phone to its factory settings, or upgrade the phone to the latest version. If it is still unavailable, back up the data in advance and take the purchase invoice to the after-sales service point for maintenance.