If Touch ID isn't working on your iPhone or iPad
- Make sure that you have the latest version of iOS.
- Make sure that your fingers and the Home button are clean and dry. ...Â
- Your finger should cover the Home button completely, touching the surrounding metal ring. ...Â
- If you're using a case or screen protector, make sure it doesn't cover the Home button or the surrounding ring.
If Touch ID isn't working on your iPhone or iPad - Apple Support