1. Restart your phone by holding down the power button for a few seconds.
2. Check the current software version of your phone and upgrade to the latest version of the operating system if necessary.
3. Uninstall and reinstall the apps causing the screen to malfunction.
4. Check if the touch screen is blocked by a screen protector or case.
5. Use the touch screen calibration tool in the phone's settings, if available.
6. Connect your phone to a computer and use specialized software to fix any technical glitches.