eycher wrote:
Yes, sorry, it works every time after this.
In fact in the last week or so, after I got aware of the cleaniless of the sensor and changed my usage pattern to accomodate for that (for example, I go the passcode screen myself in the gym as I know my hands are sweaty and only work from time to time with Touch ID making it dirtier in the process) it started working quite good for me. I just wipe it once in a few days or after I used it in bad conditions (such as in the gym).
I don't really like being aware of this and changing my usage patterns. I'd like it to just work. And I think it does for a lot of people, but not for me. It seems logical that cleaninless should play a role in how successful the detection is — imagine you constantly holding your phone by the camera lense, I bet the quality of photos will start to decline rapidly too.
Hopefully Apple can eventually make software good enough to still read the print even in really bad conditions and yet remain secure.
None of that should really matter because if you were to scan your fingerprints with a dirty sensor, TID would work perfectly for awhile no matter what. It is not until some time later that failure commences. Putting aside hardware issues (which I assume are minimal for most) the only conclusion is there is a software glich that needs fixing. I beleive there are multifactorial reasons for failure, all software related in one way or another.
With that being said, I am getting almost 100% success with my right thumb since scanning it the Joe_Fo way about a week ago, and this is despite dry cracking skin on my thumb. The other fingers, similarly scanned still fail.