For those of you that complain about Touch ID not working when you're finger is wet, think about it. The channels between your ridges are filled with water, therefore your thumb print has changed. And yet, you're upset that Touch ID doesn't recognize a different pattern. Hmmm.
When I setup Touch ID, I tend to move my finger around to cover more surface area of my finger. And then, when it asks to scan the edges of your finger, put some serious angle on that, and go all the way around. I get, maybe, one unrecognized scan once a week.
Actually, for me, I've had to retrain myself on waking up my screen, because I've always used the home button to wake up the screen. Since I tend to keep my finger on the button the screen unlocks when all I really wanted was to see the existing notifications.