iPhone 's fingerprint sensor on the Apple iPhones does n't always work the way it should . Some 5S do n't approve fingerprints they 're supposed to approve . Sensor is susceptible to problems caused by dust , moisture , and electrostatic discharge , . User error could also be causing some people 's issues with the Touch ID system .
Apple 's fingerprint sensor on the iPhone 5S does n't always work the way it should . Some iPhones do n't approve fingerprints they 're supposed to approve . Sensor is susceptible to problems caused by dust , moisture , and electrostatic discharge , . User error could also be causing some people 's issues with the Touch ID system .