Dexcom G5 User Manual page 29

If a sensor wire breaks under the skin with no portion of it visible, don't remove
it. Contact your healthcare professional if you have redness, swelling, or pain
at the insertion site.
Placement
Do not insert the sensor component of the system in a site other than the
belly/abdomen (ages 2 years and older) or the upper buttocks (ages 2 to 17
years). The placement and insertion of the system sensor is not approved for
other sites.
The system has not been tested in other areas and may not work properly if
inserted in other areas.
Storage
During a sensor's shelf life, store it between 36° F-77° F. While you don't need
to keep your sensor in a refrigerator, you can as long as the refrigerator is
between 36° F-77° F.
Never store sensors and/or sensor packages in a freezer.
Storing the sensor incorrectly might cause the sensor glucose readings to be
incorrect, resulting in you missing a severe low or high glucose event.
Precautions
Expiration Date
Don't use expired sensors. Before inserting, always check the package label
for the expiration date using the YYYY-MM-DD format.
If past the expiration date, don't use because the sensor glucose readings
might not be accurate, resulting in you missing a severe low or high glucose
event.
Sensor Package
Don't use sensor if its sterile package has been damaged or opened. Using a
non-sterile sensor might cause infection.
Clean and Dry Before Using
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Dexcom G5 Mobile System User Guide
Risks and Benefits