Some of you may know that Emily participated in the JDRF Artificial Pancreas study for a year and wore a Navigator intermittently for 6 months and then continuously for 6 months. During that time, the Navigator was not FDA-approved. The non-FDA approved Navigator we had was awesome. We had zero problems with it, and it was almost always within 5 points of her fingerstick BG. The bad news is that the non-FDA approved Navigator died 13 months after we began use. We finally got our insurance to cover some sensors. We got our new, FDA approved Navigator last month and she's been wearing it. However, I'm finding some problems we didn't ever have before! This last sensor was way off fairly frequently. Even when her BG wasn't traveling, she was 40 points or more off. She was sometimes within 5 points of the actual BG, but it varied GREATLY. Our range has gone down considerably. On the non-FDA approved one, we got a good 25 feet distance. On this new one, we're getting 10-15. Not bad, but not the same. Anyway, I'm bummed that the receiver AND transmitter died so soon on the "old" Navigator--does that mean we'll have to ask insurance to buy a new one each year? And I'm wondering if any changes were made to the FDA-approved sensors. We are getting a good 10 days use out of the sensors, but that dang sweat probe is really biting a hole in her skin. The actual insertion site for the sensor is nil--it heals up within hours. They have to do something about the sweat probe, though! It rubs too much. Has anyone used expired sensors with any luck? I have a few left and may use one on myself to see if it works.