I'm using a fingerprint door lock, but it's not recognizing well



fingerprint-recognition door-lock

I'm using a fingerprint door lock.

It usually works well, but sometimes it doesn't recognize it well.

I wonder if there's something wrong with the machine, but sometimes it works well.

Can fingerprints not be recognized well under certain conditions?


1111 2015-08-29 Gentleman

A. 1

There are times when my hands are dry.
Blow your breath or apply saliva.


Gentleman 9 years ago 0


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