How Long Can You Wear a Dexcom Sensor? Best Practices & Tips

If you’re using a continuous glucose monitor (CGM) like the Dexcom G6, G7 or Stelo, you may be wondering, “How long can you wear a Dexcom sensor?” Understanding the wear time of these devices is very crucial for effective diabetes and lifestyle management.
In this article, we’ll explore the lifespan of different Dexcom sensors, tips for maximising wear time, and key considerations for users. Whether you’re managing diabetes or tracking glucose for wellness, this guide has you covered.

Dexcom Sensor Wear Time: Model-by-Model Breakdown

Dexcom offers several CGM models, like Dexcom G6 and G7, each with specific wear times. This wear time is approved by the Food and Drug Administration. Below, we detail the duration for each sensor, including recent updates and much more.

Dexcom G6 Sensor Duration

According to FDA & Dexcom, the G6 sensor is approved for up to 10 days of wear. This applies to both the standard G6 and G6 Pro models. After 10 days, the sensor must be replaced to ensure accurate glucose readings.

Dexcom G7 Sensor Duration

The Dexcom G7 sensor  is also approved for up to 10 days, with an additional 12-hour grace period, totalling 10.5 days of wear. It is the advanced one that you use with an extra edge. However, recent FDA clearance in April 2025 extended the G7 sensor wear time to 15 days for new sensors, which will be available in the second half of 2025. This makes the G7 the longest-lasting CGM sensor from Dexcom.

Dexcom Stelo Wear Time

The Stelo by Dexcom, an over-the-counter glucose biosensor designed for non-insulin users, is approved for up to 15 days of wear, with a 12-hour grace period. Note that Dexcom reports that approximately 20% of Stelo sensors may not last the full 15 days. So keep this information in your mind.

Limit on Dexcom Sensor Wear Time

Dexcom G6 & G7 sensors have a defined lifespan due to several factors that ensure safety and accuracy:

• Enzyme Degradation: According to the correct information of Sugarmds, this sensor uses an enzyme called glucose oxidase to measure glucose levels, which degrades over time, reducing accuracy.
• Adhesive Wear: The adhesive that sticks to your skin with the sensor may weaken its ability, increasing the risk of the sensor detaching from your arm.
• Infection Risk: Wearing it for a long period of time can increase the chance of bacterial infection at the insertion site, signalled by redness, swelling, or discharge. If you see such a type of rashness, just remove and wash your site. If the condition persists, call your doctor for further prescriptions.
• Allergic Reactions: Extended wear may cause skin irritation or allergic reactions in some users. 1 Out of hundred case is reported, so do not use too much because your health is at stake with Cgm Monitors.

Adhering to the recommended wear time approved by the FDA ensures reliable glucose readings and minimises health risks.

Extending Dexcom Sensor Use?

While some users may consider extending the use of a Dexcom sensor beyond the approved period to save costs, this is not recommended. Extended wear can lead to:

• Reduced accuracy of glucose readings due to enzyme degradation.
• Increased risk of Allergic Contact Dermatitis (ACD).
• Potential adhesive failure, causing the sensor to detach.

Always consult your healthcare provider before attempting to extend sensor use, as individual health needs vary. It depends on the age of that person.

Tips for Maximising Dexcom Sensor Life

To ensure your Dexcom sensor stays secure and functional for the full approved wear time, follow these CGm Monitors’ tips:

• Choose the Right Insertion Site: For the G6, use the abdomen or upper buttocks (for ages 2–17). For the G7, the back of the upper arm is recommended for ages 2 and older, or the upper buttocks for ages 2–6. Avoid scars, tattoos, or irritated skin because the sensor may detach from body.
• Use Adhesive Patches: Apply overpatches or medical-grade tapes like SkinTac to secure the sensor, especially for active users, swimmers and those one who have oily skin.
• Keep Skin Clean and Dry: Clean the insertion site with rubbing alcohol (isopropyl alcohol) before applying the sensor to improve adhesive strength. It is easily available on medical stores.
• Replace Loose Patches: If the adhesive begins to peel even with the medical-grade tapes, replace it immediately to prevent sensor detachment.
• Monitor for Irritation: Check the insertion site regularly for signs of infection or allergic reactions, and remove the sensor if symptoms appear. If symptoms persist then call your doctor for further treatment.

G6 and G7 sensors of Dexcom are water-resistant and can be worn while swimming, showering, or exercising, but ensure the sensor remains within 20 feet of your device to avoid signal loss.

/image

How to Change a Dexcom Sensor

When it’s time to replace your sensor, follow these steps:

• Remove the Old Sensor: Gently peel off the adhesive from the placement sites. If residue remains, use adhesive remover products like TacAway Adhesive Remover Wipes that Dexcom recommends.
• Clean the New Site: Use rubbing alcohol to clean the new insertion site and let it dry completely; otherwise, it may cause itching.
• Insert the New Sensor: Follow the insertion instructions provided with your Dexcom G6, G7, or Stelo. Enter the sensor code (if required) into your device or app.
• Secure the Sensor: Apply an overpatch or adhesive tape if needed, especially for active lifestyles.
• Check Connectivity: Ensure the sensor is paired with your Dexcom app or receiver for continuous glucose readings.

Conclusion

Knowing how long you can wear a Dexcom sensor is essential for effective glucose monitoring. The Dexcom G6 lasts up to 10 days, the G7 up to 10 days (with 15-day sensors coming in 2025), and the Stelo up to 15 days. You can maximise your sensor’s lifespan by following proper insertion techniques, using adhesive patches, and monitoring skin irritation. Always consult your healthcare provider for personalised advice, and visit Cgm Monitors for additional resources.

Stay informed, stay healthy, and keep your glucose monitoring on track!

FAQS