I am 3 weeks in with my 670G and have constant issues with Auto-Mode looping. I think I’ve only gotten Auto-Mode to work for a couple of days the whole time. I’ve tried everything mentioned here, waiting (30 min to 2 hrs) and the second slightly off BG entry. Neither have worked for me. I’ve also tried turning off Auto-Mode on the pump for a while, then turning it back on with a new BG. I’m not sure what else to try. Auto-Mode seemed to work okay when I had it working, but this whole loop thing is infuriating.
Maybe I’m having such trouble with the loop because my sensors are almost always 30-40 pts or more off of my finger stick BG. Seriously, I can count on one hand the number of times my finger stick and sensor readings were within 10 points of each other. This is also pretty maddening, especially at night when the sensor THINKS I’ve gone low and says I’m at 45 setting off alarms (even the vibrate wakes me), but really I’m at 90. I read another comment here saying that you shouldn’t calibrate if your finger stick is more than 35 points off of the current sensor reading. If that’s true then I should probably never calibrate. But isn’t that the entire point of calibrating so that the sensor knows where it should be and can correct if it’s off? Most of the time right after a calibration is complete (assuming it’s accepted) the BG displayed immediately starts out 20 pts lower than what I entered and just goes off from there. This seems to be my norm whether the sensor is on day 1 or day 6.
I also have yet to put on a sensor that didn’t fail within a day. After the second one I looked online to see if there was a way to recover a “failed” sensor. If you detach the transmitter from the sensor, put the transmitter on the charger for a bit (15-60 min usually does it), then put it back on the transmitter and start a new sensor from the pump it usually takes it again. Have to wait for the 2 hour warm-up to complete. Maybe all the sensors I’ve used so far are from a bad batch? Whatever the case, I’m quickly losing faith with the Guardian 3 sensor’s ability to accurately show my current BG level. In my humble opinion, it being 30+ points off from a finger stick is not accurate. That difference can easily be the difference between needing to treat a low and being perfectly fine. Back when I was using my Dexcom G4 Platinum I don’t recall it being so wildly off so often. Also, the way the Guardian 3 attaches, which oval tape or something other adhesive tape, getting the transmitter sticky, and requiring regular scrubbing is miles behind the simple snap-in of the G4. Medtronic couldn’t have come up with a better solution?
So far I’ve only put the sensors in the recommended areas around the stomach, but each one has been a similar story. It doesn’t seem like rocket science, I’ve read the manual on this many times, talked with support and trainer, but no one seems to have an answer. Does anyone here have any additional tips or suggestions? I’d love to really give auto-mode a try and see if it does really work long-term, but so far that just hasn’t worked for me. I stopped with the Dexcom because I really don’t like having two things hanging off me at all times, and the Guardian 3 isn’t doing itself any favors so far. I’m really thinking about asking if I can return the whole thing, get a refund and go with Omnipod.