Ain’t Nobody Got Time For That (Wetting Phase)

Folly consider but consider anyway: possible outfoxed Dexcom. Simultaneous vague memory scrape around brain maybe tried outfox before & crime not pay.

Yesterday sensor = one week old. Execute standard outfox. i. e. STOP SENSOR/START NEW SENSOR upon REPLACE SENSOR SOON screen appear.

Today = sensor 8 days old real life/1 day old Dexcom brains. Child mention (as usual Day 8/9) sensor hurts. Remove. Harpoon new one. Execute unorthodox outfox: no stop sensor/start new sensor. Act casual. Carry on as if new sensor is same one as “1 day old”(8-days-old) one.

Now Bigfoot tangled web lies. Sort out truth: thing in kid’s abdomen is new–wrapper not hit wastepaper basket yet. Dexcom thinks it’s 1 day old. Meanwhile, “real” 1 day old one actually 8 days old & in aforementioned wastepaper basket.

Reality check. New/fake 1 day old sensor not spot-on; red hot buzz alert LOW UNDER 55 (“45”) while Verio IQ report 65. But still. Better than nothing.

Why not skip over wetting phase, when possible? Just yesterday paid it forward w. charade of “wetting” super-saturated 7-day-old sensor.

Maybe dry/new sensor not accurate these two shoulda-been-wetting-phase hours, but…worst case scenario = two hours inaccurate data instead of two hours data blackout.





13 responses to “Ain’t Nobody Got Time For That (Wetting Phase)

  1. Suggested outfox for next time: leave old sensor in/connected… harpoon new sensor, let “wet” for 2 hours while still getting readings from old sensor. Then… remove old sensor, put transmitter in new sensor without stopping/suspend and voila! no data black out PLUS no data wrong number problems… calibrate as normal. Of course, we are on first ever Dexcom sensor so mostly just thinking with my fingers, no hard evidence this will work any better.


    • Katy

      From here, that sounds BRILLIANT!


      • Katy

        From here, that sounds like it should be in the instruction manual.


      • Katy

        Actually now that I think about what I think you mean, this won’t work because the thing will not work unless you stop/start. And it takes 2 hours whether your thing is pre-wetted or bone dry.


      • I just realized this yesterday when we had to restart our first sensor. So sad. My daughter was on the medtronic enlites for a few weeks in November and we were able to do it like that. It would actually detect whether it was wetted or not and would request calibration within 5-10 mins after starting the sensor. Too bad, it really would make things lovely.


      • Wait..wait. I just re-read my first statement. I am having to re-explain my thought process to myself so here goes:
        1. On day 7, restart old sensor at sensor end (will have 2 hour warm up since it thinks it’s a new sensor)
        2. On day 8, 9, whenever hurt/itchy happens – insert new sensor, do NOT stop old sensor
        3. After 2-3 hours, remove old sensor, put transmitter in new sensor, do not stop or start, calibrate within a few minutes after connecting transmitter to new sensor.

        So…basically what you did, except put the new sensor in and don’t change the transmitter over right away, just give it time to wet and then change it without letting dex know it’s a different sensor.

        Liked by 1 person

  2. I use the Medtronic, not Dexcom CGM, and that lets you see the ISIG value… basically a measurement of what the sensor sees before it goes through the math to get to an estimated BG reading. You can see the ISIG during the 2-hour warmup, too.

    Usually, an “in-range” BG gives an ISIG of about 12 to 18. But for a freshly inserted sensor, the ISIG could be in the upper 30s. So if you were able to calibrate and tell it that an ISIG of 37 correlates to, a BG of 107, you could imagine the BG reading you’d get when the ISIG stabilizes at 15…it would think your BG just dropped to time-to-panic levels.

    Hence the two-hour “warm-up” period. I imagine Dex works somewhat similarly. (Though, in my experience with MedT, even two hours isn’t enough – my sensor reading continues to drop as the ISIG normalizes – that may be unique to the MedT SabreSensor, and shhh… I’d rather deal with this quirk than have a longer wait).

    Does this make sense? Hope it’s not too techy. Point is, what you saw is exactly what I’d expect.

    But you do earn brownie-points for beating the system (gluten-free and low-carb, but brownie points nonetheless). Beating the system is always admirable.


    • Katy

      I barely understand what you’re saying, but I think it explains why this was the Worst Outfox Maneuver EVER. Totally unreliable readings. STILL. I guess it needed to *know* it was a new guy in order to calibrate correctly? So now…instead of 2 hours of no data, I have 2 days of whiplash-inducing numbers. Great job, Me!


    • Scott, I have to say that the ISIG values being visible is one of the things I miss about the medtronic CGM. And the fact that if your ISIG is within the expected value it will prompt you for calibration based on the ISIG and not just based on an arbitrary amount of minutes since sensor start. Aside from that my daughter had a really terrible time with the MM CGM and we are so much happier with the Dexcom. I popped it on her the first day and within 12 hours we were getting readings that were within 10 points of meter BG and stayed that way the entire 7 days. Of course, then we got a receiver error and are expecting a replacement sometime today after only a week of use…but, not everything can be perfect, right?


  3. First time I’ve not been able to follow what you’re trying to say. Did you figure out a way to skip the 2 hr calibration? I like what type1dmom suggests above, however, you’re still going to have to start/stop the sensor because at 7 days it just shuts off. Once you start again, it always goes through the 2 hr warm up. What am I missing?


    • Katy

      What I meant was: I had just, within 24 hours, done the stop/start on a 7-day-old sensor. Then on day 8, B. said the sensor hurt (this always happens on day 8 or 9) so I took it out and put on a new one. But I didn’t tell Dex it was a new one. It was not smart.


      • Ahhh, I’m with you now. You stuck in a new one and just put the transmitter in the new one, fresh sensor right away. I can see this being tempting if you’ve only just done the 2 hr start up within the last 24 hours (on the old sensor). Too bad it didn’t work out.


  4. I’ve accidentally done this before! Changed my sensor before the transmitter was smart enough to figure it out (I guess before it tried to read my blood sugar while I didn’t have a sensor in). I was too much of a wuss to see if it would work well or not. Thank you for taking one for the team!


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