1. iMore.com's Avatar

    Touch ID can sometimes be a mixed bag and if you find some prints just not working, it may be best to delete them and start over assuming you've already tried retraining Touch ID with no success. To wipe the slate clean and start over, you just need to remove all your prints. Here's how:

    Full story from the iMore Blog...
    03-31-2014 12:40 PM
  2. Jaguarr40's Avatar
    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

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