Fifteen years in DME means I’ve seen pretty much every CGM platform come through — the launches, the glitches, the updates Abbott and Dexcom never quite communicated to patients. I know what actually goes wrong with these devices for seniors and what you can fix yourself. That’s what I’m writing about here.

— Susie Adriance, founder of Senior CGM Support

Lost CGM Signal: Reconnecting Your Device

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Medical Disclaimer: This article provides general guidance for CGM users, including how to address a lost CGM signal reconnecting. Always consult your device manual and healthcare provider for specific instructions related to your CGM model. Losing your CGM signal can be frustrating, especially when you’re relying on those important blood sugar readings. If you’re experiencing a lost CGM signal and

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need help reconnecting your device, you’re in the right place. We’ll walk you through the process step by step, just like a helpful family member would.

Why CGM Signals Get Lost

Before we fix the connection, let’s understand why your CGM might lose signal: Common Causes:

Your smartphone or receiver is too far from the sensor
Something is blocking the signal (like thick walls or metal objects)
Your device’s Bluetooth is turned off
The CGM app needs updating
The sensor is coming loose or has expired
Your smartphone needs a restart
Battery issues with your phone or receiver

📱 Distance Matters: Keep your receiver or smartphone within 20 feet of your CGM sensor for the best connection. Think of it like staying in the same room or nearby room.

Simple Steps to Reconnect Your Lost CGM Signal

Let’s go through this together, one easy step at a time:

Step 1: Check the Basics First

Before anything else, let’s verify these simple things:

Check Distance
- Bring your phone/receiver close to your sensor
- Stay within 6 feet while troubleshooting
- Remove any cases or covers temporarily
Verify Bluetooth is On
- Go to Settings on your phone
- Look for Bluetooth
- Make sure the switch is ON (green or blue)
Check Airplane Mode
- Swipe down from top of screen
- Look for airplane icon
- Make sure it’s OFF (not highlighted)

What You’ll See: Look for the Bluetooth symbol at the top of your phone screen. It should be blue or white, not gray.

Step 2: Restart Your Devices

Sometimes a fresh start is all you need:

Turn your smartphone or receiver off completely
- Hold power button for 3 seconds
- Select “Power Off” or “Shut Down”
- Wait for screen to go black
Wait 30 seconds (count slowly to 30)
- This gives the device time to fully reset
Turn it back on
- Press power button until you see the logo
- Wait for complete startup
- Check if CGM reconnects automatically

Step 3: Check Your CGM App

If restarting didn’t work, check the app:

Open your CGM app
- FreeStyle Libre, Dexcom, or your specific app
- Look for connection status
Check for app updates
- Go to App Store (iPhone) or Play Store (Android)
- Search for your CGM app
- Tap “Update” if available
Force close and reopen the app
- Double-tap home button (or swipe up)
- Swipe the CGM app up to close
- Reopen the app

Step 4: Advanced Troubleshooting

If you’re still having issues, try these steps: For FreeStyle Libre:

In the app, go to Settings
Select “Connected Devices”
Remove your sensor
Add it back by scanning again

For Dexcom:

Go to Settings in the app
Select “Transmitter”
Tap “Pair New”
Enter your transmitter serial number

For Guardian/Medtronic:

Navigate to “Sensor” menu
Select “Connect Device”
Follow on-screen prompts

Device-Specific Tips

FreeStyle Libre Signal Issues:

Scanning problems? Clean your phone camera lens
Reader issues? Check battery level (charge if needed)
Sensor problems? Ensure it’s firmly attached

Dexcom Signal Issues:

G6/G7 specific: Check transmitter battery life
Multiple devices? Ensure only one is trying to connect
Share feature? May need to re-invite followers

When Signal Loss is Actually Sensor Failure

Sometimes the issue isn’t connection but sensor failure: Signs of Sensor Problems:

Sensor is peeling off
You’re past the sensor’s expiration (10-14 days)
Error messages about sensor failure
Inaccurate readings before signal loss

What to Do:

Check sensor adhesion
Note when sensor was applied
Have replacement sensor ready
Document issues for warranty claims

Preventing Future Signal Loss

Here are some senior-tested tips to keep your CGM connected: Daily Habits:

✅ Keep your device charged (set a daily reminder)
✅ Carry your receiver in a front pocket or nearby purse
✅ Check your connection every morning with breakfast
✅ Keep phone and CGM app updated

Weekly Maintenance:

✅ Restart your phone once a week
✅ Check for app updates
✅ Clean your phone’s Bluetooth settings
✅ Test your backup meter

Smart Setup:

✅ Write down these steps for quick reference
✅ Save support numbers in your phone
✅ Keep device manuals handy
✅ Have a backup plan for readings

🌟 Family Tip: Ask a family member to help you save this article on your phone or print it for easy access.

Creating a Signal Loss Action Plan

Be prepared with this simple checklist:

Emergency Backup
- Keep traditional meter and strips handy
- Know how to do manual checks
- Have doctor’s number saved
Quick Reference Card
- Write down your CGM model
- Note your usual settings
- List troubleshooting steps
- Include support phone numbers
Support Network
- Identify tech-savvy family member
- Save CGM support number
- Know your Medicare DME contact

When to Call for Help

Sometimes you need a helping hand, and that’s perfectly okay. Contact support if:

Your signal has been lost for more than 2 hours
You’ve tried all steps and still have no connection
You see error messages you don’t understand
Your sensor is failing repeatedly
You need a replacement sensor

Medicare Coverage Note: Medicare covers CGM support services. Don’t hesitate to call for help!

Support Resources

Senior CGM Support CGM Support:

Phone: 727-831-3729
Hours: Monday-Friday 8am-8pm EST
Saturday: 9am-5pm EST

Manufacturer Support:

FreeStyle Libre: 1-855-632-8658
Dexcom: 1-888-738-3646
Medtronic: 1-800-646-4633

Quick Wins for Common Issues

“My phone says Bluetooth is on but CGM won’t connect”

Turn Bluetooth OFF, wait 10 seconds, turn back ON
Delete and re-pair the CGM in Bluetooth settings

“It worked yesterday but not today”

Check if your phone updated overnight
Reopen permissions for the CGM app

“Connection keeps dropping”

Check for interference (microwave, other Bluetooth devices)
Keep phone on same side of body as sensor

The Bottom Line

Remember, you’re not alone in this journey. Many seniors successfully manage their CGMs every day, and you can too. Technology hiccups happen to everyone – even your tech-savvy grandchildren! The key is having a plan and knowing where to get help. Most connection issues can be solved with the simple steps above. When in doubt, don’t hesitate to call for support. Your health and peace of mind are worth it.

Need Immediate Help?

If you need help reconnecting your lost CGM signal right now, our support team is just a phone call away. Call Senior CGM Support: 727-831-3729 We’re here to help you get back on track with your diabetes management.

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