Hello! I understand you're getting a "replace sensor" notification on your FreeStyle Libre 3 app even after putting in a new sensor. Let's see if we can get to the bottom of this together.

First, can you tell me a bit more? For example:
- When did you start seeing the notification? Was it immediately after placing the new sensor or after some time?
- Are you using the same device (Windows system with WebKit browser) to read the sensor data?
- Have you tried restarting the app or your device?
- Did you properly activate the new sensor in the app as per the usual setup instructions?

Meanwhile, generally, the "replace sensor" alert means the sensor has performed a quality check and has shut down for safety reasons—this usually means that sensor itself is no longer working correctly and a new one must be applied to continue monitoring4.

Sometimes, if the app hasn't registered the new sensor properly, it might keep showing this alert, thinking the old sensor is still there. So next, I recommend this step-by-step approach:

1. Close and reopen your FreeStyle Libre 3 app: This can refresh the sensor status.
2. Restart your device: Sometimes the system needs a fresh start to clear old data.
3. Check sensor activation: When you apply a new sensor, the app should prompt you to start a new sensor and scan it. Make sure this step was completed fully.
4. Clear the app cache or data (if accessible in your Windows/WebKit environment): This can remove any lingering sensor info that might confuse the app.
5. Check for app updates: Ensure your app version is current; an outdated app can cause sensor recognition problems.

If after these steps the message still persists, the new sensor might have a fault, or there could be an app-specific issue. In that case, we can look into more advanced troubleshooting or consider contacting Abbott Diabetes Care support directly.

Let me know which of these steps you've tried or if you want me to guide you through them on your device!

I knew my sensor was due and replaced it prior to the first alert to replace it. I scanned it and all seemed ok but soon there after the alerts started and even after dismissing them they come back every 5 -10 minutes. I have restarted my i phone a couple of times but it did'nt help

Thanks for sharing those details! Since you're using an iPhone and have replaced and scanned the new sensor properly, yet the "replace sensor" alert keeps coming back repeatedly, it points to something going wrong in how the app is recognizing or communicating with the new sensor.

Here’s a step-by-step approach tailored to your iPhone setup to try next:

1. Force-Close and Restart the App
- Double-click the Home button or swipe up from the bottom (depending on your iPhone model) to bring up the app switcher.
- Swipe up on the FreeStyle Libre 3 app to close it completely.
- Open the app again and check if the alert persists.

2. Check for iOS and App Updates
- Go to Settings > General > Software Update to ensure your iPhone iOS is updated.
- Open the App Store, tap on your profile icon, and scroll down to ensure the FreeStyle Libre 3 app is updated to the latest version.

3. Turn Bluetooth Off and On
- Since the sensor uses Bluetooth to communicate, sometimes toggling Bluetooth off and on can help. Go to Settings > Bluetooth, switch it off, wait 10 seconds, then turn it back on.

4. Restart Your iPhone Once More
You mentioned restarting, but it's worth doing this again after toggling Bluetooth.

5. Remove and Reinstall the App
- Backup any important data if needed (your readings should sync to LibreView if connected).
- Delete the app from your iPhone.
- Restart the iPhone.
- Re-download the FreeStyle Libre 3 app from the App Store.
- Log in and scan the sensor again.

6. Sensor Site Check
- Sometimes skin irritation or an imperfect sensor application can cause sensor faults. Although you scanned it successfully, verify the sensor site is clean and dry.

7. Contact Abbott Support if All Else Fails
- If after all these steps the alerts persist, your new sensor could be defective. Abbott offers replacement sensors and can assist via their support channels.

Several users with similar iPhone situations have found clearing and reinstalling the app combined with ensuring iOS and app updates usually resolves these alerts1 3.

Would you like me to walk you through any of those steps in detail or assist with contacting support if needed?