Blergh! I just had a sensor bite it after six days. It was very sketchy the whole week, but I finally gave upon on it last night. When I removed it, I found the tiniest bit of blood on the tape and a bit inside the bottom of the sensor. Now I'm paranoid that I might have the same thing happen again. Strange thing is I have much better luck on my right side than my left. I wonder if it has to do with how I press the plunger when I'm inserting the sensor. So frustrating since I'm paying for all this on my own!
