Im new to the Dex and am loving it. Its really helping with my control this time around. I had the MM CGM, but didnt seem to work with me as well as the Dex has. So the question is how long has a single dexcom sensor lasted you? I know they are rated for 7 days, but a lot of folks use them longer. Any issues to keeping the sensor in longer than the 7 days (other than the normal tissue issues and what not)?