If you’re currently deciding whether the Dexcom G6 is right for you, or have been wondering for a while which accessories are actually useful: here is my honest account of my experience. I’m Sonja from Zuckerschmuck, and I’ve been wearing the Dexcom G6 around the clock for five years. I mirror my readings to my smartwatch via Bluetooth, so I can keep an eye on my glucose trend at all times.
At a glance: technical specs of the Dexcom G6
In my experience, the Bluetooth range is optimistic on paper: for me, the connection drops immediately in the sauna or behind thick walls. In everyday life, however, this hardly matters once the smartphone and sensor are back in the same room.
- Sensor type: rtCGM (= real-time CGM, continuous glucose monitoring with live display)
- Wear time per sensor: 10 days
- Measurement site: subcutaneous tissue (= subcutaneous fatty tissue, where the interstitial glucose level is measured)
- Measurement interval: every 5 minutes
- Calibration required: no, factory-calibrated; calibration optional [1]
- Warm-up period after insertion: 2 hours; during this time, the G6 does not display any values [1]
- Measuring range: 40 to 400 mg/dl (2.2 to 22.2 mmol/l) [1]
- Transmitter: According to Dexcom, the battery lasts 3 months, while the sensor is replaced independently of this every 10 days
- Water: According to Dexcom, the sensor and transmitter are water-resistant down to a depth of approximately 2.4 meters for up to 24 hours; the receiver is not
- Bluetooth range (manufacturer’s specification): approx. 6 meters
- Apps: iOS and Android (Dexcom G6 app)
- Data sharing with followers: up to 10 people via Dexcom Share and the Dexcom Follow app (from Follow version 4.0, previously 5) [5]
- Minimum approved age: 2 years
- Hypoglycemia warning: up to 20 minutes in advance (the “Urgent Low Soon” feature, according to the manufacturer [3])
How does the Dexcom G6 work?
The Dexcom G6 is an rtCGM sensor that measures the glucose level in the subcutaneous fatty tissue every 5 minutes and sends it wirelessly to your smartphone or the Dexcom receiver. In 2015, the Institute for Quality and Efficiency in Health Care (IQWiG), commissioned by the Federal Joint Committee, determined that continuous glucose monitoring with real-time devices provides additional benefit [2]. The German Diabetes Association lists the G6 with its technical specifications in its practical recommendation for glucose monitoring [1].
- With the push of a button, the applicator inserts the hair-thin sensor filament under the skin.
- The sensor continuously measures the tissue glucose signal, while the transmitter sends it on via Bluetooth.
- The data goes to the Dexcom G6 app (iOS, Android) or the dedicated receiver.
- Up to ten followers (parents, partners, clinic) can view the readings live [5].
Where can I insert the Dexcom G6?
According to Dexcom, the official insertion sites (often also called wear sites) for the Dexcom G6 are the abdomen, the back of the upper arm (from age 2), and, for kids and adolescents aged 2 to 17, additionally the upper buttocks [4]. So the upper arm is not an off-label site for the G6. It is important to choose a site with enough subcutaneous fatty tissue and no folds or pressure points, and Dexcom recommends changing the insertion site with every sensor [4]. The approved insertion sites for its successor are listed in the Dexcom G7 experience report.
If you want to apply tape to a hard-to-reach area such as the back of your upper arm, the TapeGuard concealment aid in G6 size can help you apply it without assistance.
Alerts and hypoglycemia prediction
The Dexcom G6 has a feature called “Urgent Low Soon” that, according to the manufacturer, warns up to 20 minutes before severe hypoglycemia (= low blood sugar, a reading of 55 mg/dl) [3]. You can set the thresholds for the usual high and low alerts yourself in the app. Discuss how to respond in your specific situation with your diabetes team; the sensor does not replace medical advice.
What I really noticed after 5 years with Dexcom G6
The theory is covered in the manufacturer’s brochures. Here are the points I only understood after wearing one for a longer time:
The first hour after insertion is critical. Newly inserted sensors are often off during the first 60 minutes, then they settle down. That’s why I never plan to change my sensor on a day with important appointments.
Readings lag behind blood glucose. The sensor measures interstitial glucose, not blood glucose. When levels change quickly (exercise, sweets, insulin bolus), the app readings for me are 5 to 15 minutes behind my actual blood glucose. The German Diabetes Association also describes this delay between blood and interstitial glucose, especially during rapid rises and drops [1]. When correcting a hypo, watch the app arrow as well, not just the number.
Smartwatch mirroring is worth its weight in gold. I use the Apple Watch display so I don’t have to keep pulling out my smartphone. It works without a third-party app.
Adhesive allergies are trial and error. I only developed one after sensor 4 - the adhesive builds up. I’ve written below in the FAQ what helped me.
Wear the sensor visibly or conceal it?
It comes down to personal taste, and both sides have good arguments. If you prefer to show off your sensor, the Diabuddy Sticker for the Dexcom G6 turn the gray plastic part into a little work of art, real sensor jewelry. If you want to wear it more discreetly, we offer the skin-colored decorative tapes with a cutout and the sensor holders with armband: an elastic band with a transparent holder that sits on the upper arm instead of covering the sensor.
How do you get the Dexcom G6?
You can only get the Dexcom G6 itself from the manufacturer Dexcom or authorized pharmacies. If medically indicated, health insurance generally covers the system; IQWiG assessed it as beneficial back in 2015 [2]. In Germany, Dexcom is expected to discontinue the G6 at the end of 2026 [6]. At Zuckerschmuck, you can find the accessories for it: decorative tapes, sensor Sticker, reader bags and sensor holders with armband.
Frequently asked questions about the Dexcom G6
How long does a Dexcom-G6 sensor last?
A sensor officially lasts 10 days and must then be replaced. Some Diabuddies reactivate it after it expires. This works sometimes and sometimes not, but it is outside the manufacturer's approval and its accuracy is not guaranteed.
Where can I place the sensor?
According to Dexcom, the abdomen and the back of the upper arm are approved for the G6 (from 2 years), and for kids aged 2 to 17, the upper half of the buttocks is also approved [4]. More on this can be found in the section “Where can I place the Dexcom G6?” above.
How accurate is the Dexcom G6 in everyday life?
From my personal experience: surprisingly accurate once the sensor has made it through the first hour and isn't freshly applied. When glucose levels fluctuate quickly, I keep the 5- to 15-minute lag compared with blood glucose in mind. According to the German Diabetes Association, these differences between blood and interstitial glucose occur mainly during rapid rises and falls [1].
What can you do about an adhesive allergy under the Dexcom G6?
If the skin under the sensor itches or becomes red, skin protection wipes (e.g. SKIN PREP, SECURA) often help. They act as an invisible barrier between the adhesive and the skin. I have put together a detailed guide with all the tricks in the article Help with skin irritation caused by sensors. In the shop, you can find these products in the skin protection category.
What is the difference between the Dexcom G6 and Dexcom G7?
The Dexcom G7 is the successor and combines the sensor and transmitter in one component. It is significantly smaller (about 60 percent), and the warm-up phase is reduced from 2 hours to 30 minutes. However, the G6 is being discontinued: In Germany, Dexcom is expected to discontinue it at the end of 2026; after that, availability and stock are no longer guaranteed [6]. The Dexcom G7 experience report explains what the switch from the G6 to the G7 looks like.
How much longer will the Dexcom G6 be available?
In Germany, Dexcom is expected to discontinue the Dexcom G6 at the end of 2026, according to the manufacturer. After that, Dexcom can no longer guarantee availability and stock [6].
Why does it sometimes bleed when applying the Dexcom G6?
According to Dexcom, the insertion needle must pass through the dermis, where small blood vessels run. If the needle hits one, it may bleed; inserting it too deeply can also cause bleeding, so do not press too hard on the applicator [7].
Dexcom G6 accessories: What fits?
Four accessory categories cover most everyday questions: decorative tapes (tapes with a cutout, for concealing or decorating), sensor Sticker (adhesive labels for the transmitter), reader case (for the receiver and accessories), and sensor holder with armband (band with a transparent holder for the upper arm). There is also a screen protector for the receiver. You can find all sensor accessories in the for CGM sensors category.
What other Diabuddies write about their Dexcom G6 accessories
I don't rely solely on my own gut feeling; our customers' reviews show similar patterns. Some write that before buying, they didn't even know that Sticker for CGM sensors existed and are happy to show their sensor now instead of hiding it. You can view current reviews live in the Judge.me widget on the respective product page.
Related topic
- TapeGuard for difficult application sites: The concealment aid for sites where regular tapes fail.
- sensor holder for FreeStyle Libre: Which holder fits which sensor.
- sensor holder for Freestyle Libre and Dexcom G6: Holder variants related to Dexcom G6.
- Diabetes in summer and while traveling: Heat, insulin, and sensor: what matters when you’re on the go.
Sources and notes
I’m linking a few sources below in case you want to explore the topic further. There isn’t much more evidence anyway; most of it consists of manufacturer data and medical treatment recommendations.
- Schlüter S, Deiss D, Gehr B et al. Glucose measurement and control in patients with type 1 or type 2 diabetes. DDG practice recommendation. Diabetologie und Stoffwechsel 2025; 20: S144–S160. doi: 10.1055/a-2592-7783. Available at: DDG Practice Recommendations 2025 (PDF) [Accessed: 14.09.2026].
- Institute for Quality and Efficiency in Health Care (IQWiG). Continuous interstitial glucose monitoring (CGM) with real-time measuring devices in people with insulin-dependent diabetes mellitus. Final report D12-01. Cologne: IQWiG; 2015. Available at: iqwig.de/projekte/d12-01.
- Dexcom Inc. How does the Urgent Low Soon alert work? Available at: dexcom.com [Zugriff: 14.09.2026].
- Dexcom Deutschland. Where can I insert my G6 sensor? Available at: dexcom.com/de-DE [Accessed: 14.09.2026].
- Dexcom Deutschland. How many Sharers can I follow? Available at: dexcom.com/de-DE [Accessed: 14.09.2026].
- Dexcom Deutschland. When will Dexcom G6 be discontinued in Germany? Available at: dexcom.com/de-DE [Accessed: 14.09.2026].
- Dexcom Inc. What happens if my sensor insertion causes bleeding? Available at: dexcom.com [Zugriff: 14.09.2026].
Note: This article does not replace medical advice. If you have questions about your therapy, sensor settings, or persistent skin irritation, please contact your diabetes practice. In medical emergencies: 112.
Best wishes, Sonja
