iPhone 6+. Screen intermittently unresponsive. Ultra-annoying. Cleaned and rebooted--nothing worked. Turned off all 3 Touch ID (unlock, pay, itunes). Works fine!!! Playing around with turning each one back on individually. Seems like turning them off and cleaning the touch button helped. 10 minutes of use with all 3 back on seems to work. Another site suggests turning off hey siri as fyi. Thanks for the tip.