Use a microfiber cloth with a drop of rubbing alcohol to remove grease.
Deep scratches on the prism require a sensor replacement. Optimize User Enrollment zkteco authentication failure solution best
If you are staring at a red "Authentication Failed" message on your ZKTeco biometric terminal, you know the frustration. It’s 9:00 AM, employees are lining up, and the device that usually works flawlessly is suddenly rejecting credentials. Use a microfiber cloth with a drop of
