Top 8 Tips to Prevent Your CGM Sensor from Falling Off

Continuous Glucose Monitors (CGMs) like the FreeStyle Libre and Libre 3 have revolutionized diabetes care by offering real-time glucose data without frequent finger sticks. However, one common challenge many users face is keeping the CGM sensor securely in place for the full wear period.

Whether you're managing diabetes actively or supporting a loved one who is, sensor detachment can lead to data gaps, costly replacements, and interrupted treatment plans. This guide offers practical, research-backed solutions to ensure your CGM stays in place—even during exercise, swimming, or hot summer days.

 

Understanding Why CGM Sensors Fall Off

Skin Oils and Sweat

One of the most common reasons sensors fail to stick is due to excess skin oil or sweat. Natural oils, moisture, and humidity break down adhesive bonds quickly, especially in active individuals or during hot weather.

Poor CGM Monitor Placement

Improper sensor placement—whether too close to joints, in high-friction zones, or on uneven surfaces—can shorten the wear time. Optimal cgm monitor placement involves both anatomical suitability and daily movement consideration.

Allergic Reactions or Skin Sensitivity

Some users experience irritation or mild allergic responses to adhesives, prompting premature removal. Sensitive skin may need special barrier layers or hypoallergenic adhesives.

 

Tip 1: Choose the Right Placement Area

Sensor placement is more than just convenience—it's science. According to both manufacturer guidelines and endocrinologists, the ideal cgm monitor placement should:

• Avoid areas with frequent motion or sweat (like joints or the inner thigh)

• Stay clear of bones or scar tissue

• Be placed on smooth, fatty surfaces like the back of the upper arm (for Libre sensors)

• Rotate sites every application to prevent skin damage

Consistency in site rotation also reduces tissue trauma and improves data accuracy.

 

Tip 2: Clean and Prep the Skin Properly

Before sensor application, prep your skin like a pro:

• Wash with fragrance-free soap

• Avoid lotions or oils for at least 8 hours

• Use an alcohol pad to remove any residual oils

• Allow the skin to completely dry

For extra grip, consider using skin prep wipes that leave a tacky surface, which helps adhesives bond better.

 

Tip 3: Apply the Sensor Correctly

When inserting the sensor:

• Follow the manufacturer’s angle and pressure instructions

• Press firmly around the adhesive ring for 30 seconds post-insertion

• Avoid touching or adjusting the sensor in the first few hours

Proper application ensures complete contact between the adhesive and the skin, helping prevent early lift-off.

 

Tip 4: Use Sensor Covers or Patches

One of the easiest and most effective solutions? Invest in high-quality Freestyle Libre sensor covers designed to shield and secure your sensor.

CEEPORT’s Freestyle Adhesive Patches are:

• Waterproof & sweatproof

• Made of natural cotton for sensitive skin

• Free of glue in the center, protecting sensor function

• Easy to apply and remove

• Available in packs of 10/30 for long-term use

These covers act as a second skin—especially valuable for athletes, swimmers, or anyone with an active lifestyle.

Tip 5: Avoid High-Traction Clothing

Tight clothing, sleeves, or bras that constantly rub against your CGM can dislodge it prematurely. Opt for loose-fitting tops that don’t directly press on the sensor, especially in the first 24 hours after application.

 

Tip 6: Tape Down Edges Early

If you notice a corner of the adhesive starting to lift, don’t wait for a full peel. Reinforce it immediately using medical-grade tapes like:

• Hypafix

• Tegaderm

• KT tape

Combine them with a sensor cover for maximum security. These layering techniques are popular in diabetes forums and often recommended by diabetes educators.

Tip 7: Consider Barrier Films for Sensitive Skin

If you’re experiencing skin irritation or allergies from CGM adhesives:

• Try barrier wipes (like Cavilon or Skin-Prep) before sensor application

• Allow the barrier to fully dry before inserting the sensor

• Apply a thin hydrocolloid patch beneath the sensor if approved by your doctor

This technique cushions the skin and reduces allergic reactions without affecting adhesive performance.

Tip 8: Use the Best Libre 3 Sensor Covers

The best Libre 3 sensor covers not only protect the sensor but also extend its usability. CEEPORT's patches are among the top-rated solutions by users for their:

• Breathable materials

• Flexibility with body movement

• Stylish and minimal design

• Compatibility with Libre, Libre 2, and Libre 3 sensors

You can view and order directly from CEEPORT.com.

Bonus Tips: What to Avoid

• Don’t reapply a sensor after it falls off: This can lead to inaccurate readings or infection risk.

• Don’t apply directly after exercise or showering: Always wait until skin is cool and dry.

• Don’t use over-the-counter glue or DIY methods: These can damage both your skin and sensor.

Summary: Small Changes, Big Improvements

Keeping your CGM sensor secure isn’t just about adhesive—it’s a combination of good prep, thoughtful placement, and smart aftercare. Whether you're using Libre, Dexcom, or other CGMs, these tips will help you get the most accurate, uninterrupted data to manage your diabetes confidently.

Try our Freestyle Adhesive Patches today and experience the difference for yourself.