Issue Description
Touch ID fails to recognize fingerprints.
Common Causes
Dirty Home button
Fingerprint data corruption
Moisture on finger
Step-by-Step Solution
Step 1: Clean Home Button and Finger
Use dry cloth
Step 2: Check Touch ID Settings
Settings → Touch ID & Passcode
Ensure Touch ID is enabled
Step 3: Re-add Fingerprints
Delete old fingerprints
Add new ones
Step 4: Restart iPhone
Clears Touch ID service glitches
Explore Further
Hardware repair if Touch ID never works
Prevention & Best Practices
Avoid using Touch ID with wet fingers.