- Check the operating system version and make sure the software is up to date.
- Gently clean the screen with a soft, lint-free cloth.
- Restart your device.
- Try a different unlocking method (e.g. using the physical keys to unlock).
- Check for any external damage to the hardware.
- Disable any screen protectors or cases that are covering the device.
- Do a hard reset on the device and test if this fixes the issue.
- Consider contacting your device manufacturer for further support.