Has anyone ever noticed a small dimple or depression on the top of their Libre sensor? I am NOT talking about the little hole right in the very middle. I am talking about the very small depression, about 1.5mm in diameter, about 5mm from the outer edge of the sensor. Somebody said, on another web forum, that it indicated the location of the internal aerial for the Near Field Communications chip. They said that if you positioned your MiaoMiao above this dimple, that it would achieve a more reliable connection. When my current sensor runs out in 3 days, I have decided that I am going to pull it apart and see if anything appears to line up with it. Not a lot written about it, but then again, until I read the other forum, I never noticed it was there. Have YOU guys noticed it before?