I’m not kidding when I say I think I’ve definitively identified the worst possible time to change a CGM sensor or pod – of course, I can only speak to a Dexcom CGM sensor and an Omnipod, so it’s probable that the worst time to do a site change may vary depending on the specific piece of equipment being used.

But I’ve learned from my own experiences that the worst time to do a site change is within a one-hour window of taking a shower.

This is because I’ve found that the sensor or pod adhesive needs a solid block of time to firmly adhere to my skin. If I shower soon after completing a site change, I can almost guarantee that the heat and steam from the shower will be enough to dissolve the adhesive and cause the sensor or pod to fall off.

I’ve played around with the timing, too, and I’ve discovered that the more time I put in between a site change and shower, the better – an hour seems to be the absolute minimum. It can be a little inconvenient in the times that I have to forgo my CGM data for a longer period than I’d like, but my goodness, is it wonderful when the stars align and I can take a completely device-free shower. This doesn’t happen often as my sensor and pod change days don’t usually happen on the same day, but it’s undeniably a nice break when it does.

So, there you have it – a word of caution from me, a semi-pro CGM and pod wearer with about a decade’s worth of experience wearing both devices – the worst time to undergo a site change. A pod or CGM failure almost always can’t be helped, but I think it’s worth knowing how to prevent the likelihood of one or both of them needing to be replaced sooner than expected.