Posted December 13th, 2013 @ 07:01pm by Erik J. Barzeski
I've been using Touch ID since I got an iPhone 5s in mid-October. Generally speaking, I like it, and I find it faster than the old swipe-and-passcode method, but I've felt compelled to reteach it my fingerprints twice already. I know this sounds impossible, but its recognition of my prints seems to decay with time.
When I first started using TouchID, I was annoyed as heck with it. I re-programmed my thumb about six times over the first month.
Then I realized that I was probably just not programming the right part of my thumb. The next time I re-programmed my phone, I set it down and picked it up quickly. I pulled it from my pocket. I programmed TouchID the same way I use TouchID. I found that I typically touch far closer to my first knuckle when I use my phone than the first six times I programmed TouchID.
I've noticed no "decay" since this sixth time. I noticed decay the first six times because, gradually, I'd revert to the way I grab my phone and move away from remembering how I'd programmed it.