Touch ID worse over time?

Is Touch ID getting worse over the time of its use? I’d have to agree that yes it is and I’ve only been using the phone for about 10 days. And as a finer point, for some reason it recognizes my right thumb much better than my left. Which is bad, considering I’m left-handed.

I’m going to try to redo all the fingers again, but I of course won’t log all the instances. However, I can tell by how often I want to throw the phone as well. It’s annoying.