Troubleshooting Steps for a Phone Screen Issue:

1. Clean the phone’s screen with a soft, damp cloth.
2. Charge the phone to make sure it's receiving enough power.
3. Restart the phone to make sure no applications are interfering.
4. Check for any software or security updates that may be available.
5. Consider calibrating the phone’s touch sensitivity settings.
6. If all other options fail, contact a technician.