Dear Samsung Member,
Greetings from Samsung Customer Support!
Kindly follow the below mentioned step to improve the performance of the device:
Reregister the Finger Print: Settings> Biometric and security> Fingerprint > Continue> Set a screen
lock method> Continue> Set a screen lock> Register Fingerprint
We recommend customers to use only Samsung approved Screen protector.
For further assistance, register your concern in Samsung Members Application (Samsung Members App > Feedback >Error report > Attach log file for any issue)
Thank you for writing to Samsung.
Samsung Customer Support