I don't think prints go bad and rarely in the commercial Biometric Finger print readers go bad either. I think like I do even over training the print with some success, I use a micro fiber cloth and gently without pushing down on the home button just wipe off any grease, grime, dirt or anything that might be built up. I wipe mine off at least 2-3 times during the course of a full day and when I put my every day driver to bed at night when I hit the sack, I wipe the screen and Touch ID pad.
03-31-2014 12:46 PM