For some it’s simple skin chemistry and physical makeup. My wife had the same experience as you, Touch-ID never worked for more than a day or two no matter how may times she entered new fingerprints. My son and I entered our fingerprints into her iPhone and they worked every time for months on end, never failing to open her iPhone. So it wasn’t the censors, it wasn’t the software, it was the chemical makeup and physical composition of her skin. We now have a new Apple Magic Keyboard with TouchID for our Mac Studio Max and her fingerprints don’t work on it either.