Stupid iPad - you set up Touch ID it works for 2 days and fails again anda again and again. Why
Why does touchid on iPad keep failing. Seems to work for a day or two then stop. Does it fail if these am iOS update?
experience on phone much better.
Some users have difficulty with TouchID if their fingerprints have poor “ridge detail”, or dry skin. Repeated washing can also remove skin oils that keep the skin supple and recognisable; in some cases, washing can actually cause loss of fingerprint ridge detail.
At the other end of the scale, excessively oily skin - or use of moisturisers or barrier creams - can also interfere with fingerprint recognition.
To cite an example, if I hand-wash or polish a car (something that I do quite regularly), neither my iPhone nor iPad will recognise my registered fingerprints. Both devices then have to be “re-trained”. I find that newer devices, with the second-generation TouchID sensor, to be more tolerant than devices with the first generation sensor.
In summary, you might simply be one of the “less-lucky” when depending upon TouchID sensors. That said, if the issue is confined to a single device (other similar devices being unaffected), then you might reasonably consider the possibility of a fault. The only way to confirm this possibility is to compare with other devices.
I hope this insight is helpful - if only in providing some possibilities of causes to explore.
