Re-register the same fingerprint in the winter but don't erase the other one. That way, Touch ID will work year round.Aside from wet fingers not registering, I've also noticed that since we're in winter here in the U.S. and the skin on my fingers tends to be much drier than it is any other time of the year, Touch ID often takes several attempts to recognize my fingerprint -- if it's recognized at all. As soon as I push lotion on my hands, Touch ID works almost every single time.
Yes, skin can absorb water so it's still not completely dry. You can try registering a second print immediately after showering if it's a recurring problem.I noticed that it doesnt work even when you dry your hands especially after shower, it takes a few minutes. Its possible that it changes the fingerprint patterns which the touchid sensor uses just enough for it not to recognize.
They need to put out instructions detailing how to properly keep our hands clean and up to standards for their sensor...Dry or Wet hands affect the scan Sometimes touching powdery foods like nuts etc affect the scan and also dirt etc on the home button makes scanning harder. Be patient. Use cream on your hands if they are dry and keeping your IPhone clean will all help. Nothing is perfect under all conditions.