Hi Guys, I am on my second sensor....A US version on my right arm and only has 4 hrs left that reads 110 mg/dl but taking a blood sample of 164 three min later. I have a EU sensor on my left arm that I placed last Saturday but only activated it this morning and performed that same test at the same time 163 mg/dl but taking blood 141. no I did not get the two meters confused Lol. I placed the EU sensor way early as I have read on some forums that it can take up to 3 days to settle in and get some good readings. I have also read that this can also happen at the end of the sensors life. Has anyone else experienced the same problem? Thanks