I am loving the fingerprint unlock. I can finally use a complicated passcode and I feel the phone's data is more secure now. But recently, I've had a cold, so in polite deference to my family, I started washing my hands a bit more, which has led them to chapping. This seems to have altered the iPhone's read on my fingerprints, and I could no longer unlock reliably with my fingerprint (before I was unlocking in 9 tries out of 10. It dropped to about 4 out of 10). I went in, and redid my finger prints, and it's back to 9 out of 10. It's easy enough, and I love the feature, but I was wondering if anyone else had a similar experience? Maybe this will happen more as winter sets in, and the air dries out?