While you’re at it, do yourself a favor and rename your stored fingerprints to something meaningful so if you have a problem with a particular fingerprint, you know which one you need to fix. If you forget, don’t sweat it. Just lightly lay your finger on the home button. The iPhone will read it and highlight the corresponding fingerprint. Once done, test it to make sure you can unlock the phone with all four fingers.Johnny Mastin offers some tips on using Touch ID
I have to admit. I didn't think of doing this.
