When to Replace Your Sensor

• You’ll receive alerts from your Dexcom app or receiver before the session ends 24 hours, 6 hours, 2 hours, and 30 minutes before expiry.
  Dexcom G6 / Dexcom ONE - The session ends exactly 10 days after it was started.
  Dexcom G7 / Dexcom ONE+ last for 10 days plus a 12-hour grace period.
  

What You Need

• A new Dexcom sensor  (specific to your system).
• Your Dexcom transmitter (if your system has a separate transmitter).
• The Dexcom app or receiver.
• Something to clean both the old and new site.

Dexcom G7 and Dexcom ONE+

Step 1: Remove the Used Sensor

1. Wash your hands thoroughly.
2. Peel off over patch if separate.
3. Peel off the old sensor patch from the edge like a plaster.

Step 2: Start a New Sensor Session

• REPLACE SENSOR: To start a new sensor immediately
• STOP SENSOR SESSION: To stop this sensor without starting a new one

Dexcom G6 and Dexcom ONE

Step 1: Remove the Used Sensor

1. Wash your hands thoroughly.
2. Peel off over patch if separate.
3. Follow instructions below.

Step 2: Start a new sensor session

If you want to end the sensor session early

1. Go to Settings in the Dexcom app.
   Go to Menu in the Receiver.
2. Tap Stop / Replace Sensor  → Confirm.
3. Tap Start New Sensor and follow the prompts.

General Advice

• If the app doesn’t detect a new sensor, wait at least 5 minutes after stopping the previous session before inserting a new one.
• Insert the new sensor and start the session straight away.
  
• If the sensor fails on deployment or during warm-up, check for:
  • Incorrect insertion
  • Compression
  • Rapid glucose changes
  • Off-label insertion sites