CGM features and fixes · Dexcom Stelo

Dexcom Stelo warm-up: how long it takes

Warm-up takes about 30 minutes after you insert and pair the sensor. You get no readings until it ends. (Dexcom user guide, p. 23)

What the maker says to do

1. Wait about 30 minutes after pairing for the first reading.

Stelo is sold over the counter in the US only. Dexcom says your primary residence and your Stelo account must be in the US.

More on the Dexcom Stelo

• Signal loss
• Sensor error
• Sensor failed early
• Compression lows
• Alarms not sounding
• Compatible phones

Warm-up on other CGMs

• Dexcom G6
• Dexcom G7
• Dexcom ONE+
• FreeStyle Libre 2 and 2 Plus
• FreeStyle Libre 3 and 3 Plus
• Medtrum TouchCare Nano CGM
• Eversense 365
• Medtronic Simplera
• SIBIONICS GS1

Sources, quoted

• Dexcom user guide, p. 23: “It takes about 30 minutes for the sensor and your body to adjust to each other. You wonʼt get readings until sensor warmup is done.”

Every quote is checked against its source page before each update of this site; last checked 2026-10-06. Makers change their apps; the source page is the authority when it differs.