Let's all admit it, the fingerprint sensor on the 5s sucks. I have to re-register my fingerprint every couple of days. Everyone I know that has a 5s says the same thing. My wife has stopped using it all together. Meanwhile, the fingerprint reader on my thinkpad which is like 3yrs old still can read my fingerprint every time. Why does this fingerprint reader on the 5s suck so bad?