Mine will be 9 months old in a couple of weeks. I haven't noticed an increase in ??? and the sensor on my thigh is going on it's third week with good readings. I am very fortunate that insurance covers it 100% so there will not be any copay once it does start to warn me.
On the positive side I have gotten at least 2 and sometimes more than 3 weeks out of a sensor so I still have 4 left from the 12 they sent me in February. The rate this is going and I don't want to jinx myself, it will be at least November before I actually need my next shipment of sensors.
Clare - It's good to read about your great Dex performance. I am very happy with this system and look forward to better performance with the new transmitter. I usually get two weeks out of a sensor. I experimented with trying my current sensor on the back of my arm. It's been OK, but I do feel a little bit of pain. I'd like to find alternate sites to give my abdomen a break.
Thigh is my favorite dex site, in fact I haven't put it anywhere else since finding the perfect spot. I figure while it is on for 3 weeks the other side has plenty of time to heal.