I've never had much success with Touch ID in my iPhone 5S. While Touch ID worked well initially, my fingerprints seemed to "fade," gradually becoming unrecognized within a week or two. Invariably, I'd delete them, scan them again, and they'd work for a couple of weeks before fading again.
Friends and followers that I queried about their Touch ID accuracy claimed near-perfect results, so I chalked my experience up to dry skin or some other problem with my subdermal ridge flow angle mapping – a "lossy process that discards minutia data that would be required to reconstruct the user’s actual fingerprint" according to Apple's iOS Security white paper (PDF).
When iOS 7.1 was released on March 10, Apple noted "Improves Touch ID fingerprint recognition" way down in therelease notes. When I read this I anxiously deleted and re-scanned all of my fingerprints and sure enough, my accuracy improved dramatically. For about a month or so.
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