I was using my arm for my Guardian 4 sensor. My accuracy was horrible. I was getting a lot of alerts telling me I was lo and I would check and it would be normal. So I tried it in my thigh and the accuracy is unbelievable. I wish I had done this a long time ago as I would have saved myself a lot of anguish and trouble. Now I can trust it! I am very happy!
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I have never put the sensor on my arm. Even when I first started using G4. I just couldn’t figure out a way to do it with only one hand. I just put it on my abdomen and it’s always worked just fine.
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