# Difficulty calibrating my dexcom

**URL:** <https://forum.fudiabetes.org/t/difficulty-calibrating-my-dexcom/3179>\
**Category:** C/GM\
**Created:** [January 5, 2018, 9:03pm UTC](https://forum.fudiabetes.org/t/difficulty-calibrating-my-dexcom/3179 "2018-01-05T21:03:58Z")\
**Posts on this page:** 1\
**Showing post:** 15

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**Author:** ![Thomas](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/thomas/32/1719_2.png) [@Thomas](https://forum.fudiabetes.org/u/Thomas)\
**Post date:** [January 10, 2018, 9:45pm UTC](https://forum.fudiabetes.org/t/difficulty-calibrating-my-dexcom/3179/15 "2018-01-10T21:45:27Z")

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> [@Omnipod: auto-calc by PDM or manual bolus calculations?](https://forum.fudiabetes.org/t/omnipod-auto-calc-by-pdm-or-manual-bolus-calculations/3088/66):
>
> Maybe that’s the way it’s supposed to act, and it’s not a deviation I’m going to worry about. I’ll be curious to see whether I get the same results from my next transmitter.

This should absolutely not be anything to do with one G4 transmitter vs another G4 transmitter. That would be beyond shocking. Regardless of how old the transmitter is. Whether you can do a “double calibration entry” with a G4 and get the same response as with a G5 would (in my opinion) certainly be open for debate and testing.  
However a sensor restart (whether new sensor or restart existing sensor) should absolutely clear all previous calibration entries whether it be a G4 or a G5.

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