Start with the simplest fixes first

If your Samsung S22 fingerprint scanner stops working, the problem is usually dirt, moisture, or a software glitch — not hardware failure. Before you assume the sensor is broken, clean the scanner with a dry, lint-free cloth, make sure your finger is dry and clean, and restart your phone. These three steps fix the issue in most cases.

If the scanner still does not respond, the next step is to delete your stored fingerprints and re-enroll them. Your phone may have corrupted the fingerprint data, and starting fresh often restores normal operation. This takes about five minutes and requires no tools or technical knowledge.

Key Takeaways

  • Clean the scanner with a dry cloth and make sure your finger is clean and dry before troubleshooting anything else.
  • Restart your phone by holding the power button, then swiping to power off — this clears temporary software problems that block the scanner.
  • Delete all stored fingerprints in Settings > Security and Privacy > Fingerprint, then enroll your fingerprints again from scratch.
  • If the scanner still does not work after re-enrollment, check Settings > Apps > Permissions to confirm apps have not been denied access to the biometric sensor.
  • A factory reset erases all data but fixes deep software conflicts; back up your phone first using Samsung SmartSwitch or Google One.

Clean the fingerprint sensor and your finger

The scanner sits on the side of the S22, below the power button. Dust, skin oil, and moisture block the sensor's ability to read your fingerprint. Wipe the scanner gently with a dry, lint-free cloth — a microfiber cloth works best, but a clean cotton cloth will do. Do not use water, alcohol, or cleaning solutions, as moisture can damage the sensor.

While you are at it, wash your hands with soap and dry them completely. Wet fingers, fingers covered in lotion or dirt, or fingers with cuts or calluses often fail to scan. If you have been working with your hands, clean them first. Try scanning again after both the sensor and your finger are dry.

Restart your phone to clear software problems

A temporary software glitch can disable the fingerprint scanner even though the hardware works fine. Restarting your phone clears these glitches. Press and hold the power button on the right side of the S22 until the power menu appears, then swipe down to select "Power off." Wait 10 seconds, then press the power button again to turn the phone back on.

Once your phone restarts, go to Settings > Security and Privacy > Fingerprint and try scanning your finger. If the scanner responds, the problem was a software hiccup and you are done. If it still does not work, move to the next step.

Delete and re-enroll your fingerprints

Corrupted fingerprint data can prevent the scanner from recognizing any finger. Deleting your stored fingerprints and enrolling them again forces your phone to create fresh data. Open Settings, tap Security and Privacy, then tap Fingerprint. You will see a list of enrolled fingerprints. Tap each one and select "Remove" or "Delete."

Once all fingerprints are deleted, tap "Add fingerprint" or "Enroll fingerprint" at the bottom of the screen. Place your finger on the scanner and follow the on-screen prompts. Your phone will ask you to lift and replace your finger multiple times to capture different angles. When enrollment is complete, test the scanner by trying to unlock your phone with your fingerprint.

If the scanner works after re-enrollment, you are finished. If it still does not respond, the problem may be a permission issue or a deeper software conflict.

Check app permissions for the biometric sensor

Apps can be denied permission to use the fingerprint scanner, which can interfere with the system-wide scanner. Open Settings, go to Apps, and tap the three-dot menu at the top right. Select "App permissions," then look for "Biometric" or "Fingerprint." Tap it and make sure the toggle next to System is turned on.

Also check that any third-party apps you use for banking or security have permission to access the biometric sensor. If an app shows "Denied" or "Not allowed," tap it and select "Allow." Some apps require you to restart them after permission changes, so close and reopen any banking or payment apps you use.

Update your phone's software

Samsung releases software updates that fix bugs in the fingerprint scanner system. Check for updates by opening Settings, scrolling to the bottom, and tapping "About phone." Look for "Software update" or "System update" and tap it. If an update is available, tap "read and install." Your phone will restart during the update, which usually takes 10 to 15 minutes.

After the update finishes, test the fingerprint scanner again. If you have not updated your phone in several months, a pending update may be the reason the scanner stopped working.

Perform a factory reset as a last resort

If none of the above steps work, a factory reset will erase all data and settings, then reinstall the operating system fresh. This fixes deep software conflicts that prevent the scanner from working. However, a factory reset deletes everything on your phone — photos, messages, apps, and settings — so back up your data first.

Use Samsung SmartSwitch or Google One to back up your phone. Open Settings, go to Accounts and backup, and follow the prompts. Once your backup is complete, go to Settings > General management > Reset > Factory data reset. Tap "Reset" and confirm. Your phone will restart and erase itself, which takes several minutes. When it finishes, sign in with your Samsung or Google account and restore your backup.

After the reset, enroll your fingerprints again in Settings > Security and Privacy > Fingerprint. Test the scanner to confirm it works. If the scanner still does not function after a factory reset, the hardware is likely damaged and you will need to contact Samsung support or visit a repair center.

Frequently Asked Questions

Why does my fingerprint scanner work sometimes but not other times?

Inconsistent scanning usually means the sensor is dirty, your finger is wet or oily, or the phone is too cold. Clean the scanner and your finger, and try again in a warmer environment. If it works sometimes and fails other times even when clean, re-enroll your fingerprints — the data may be partially corrupted.

Can I use the fingerprint scanner if I have a screen protector on my S22?

The fingerprint scanner is on the side of the phone, not under the screen, so a screen protector does not affect it. However, if you have a case that covers the side button area, make sure the scanner opening is not blocked by the case material.

What should I do if the scanner is physically cracked or damaged?

If the sensor itself is visibly cracked or the phone was dropped and the scanner stopped working when ready after, the hardware is damaged. Contact Samsung support through their website or visit an authorized repair center. Hardware damage cannot be fixed through software troubleshooting.

Will a factory reset delete my fingerprints permanently?

A factory reset erases all stored fingerprints from your phone, but you can enroll them again after the reset is complete. Your fingerprints themselves are not deleted — they are just removed from your phone's storage. You will need to re-enroll them in Settings > Security and Privacy > Fingerprint.

Can I unlock my S22 without the fingerprint scanner if it is broken?

Yes. You can unlock your phone using your PIN, pattern, or password. Go to Settings > Security and Privacy > Lock type and choose PIN, Pattern, or Password. You can also use your face to unlock the phone if you set up face recognition in the same menu.