Did a new sensor last night. Overnight the numbers were extremely off... she was 256 (midnight) on time when it read "high." And then 158 (2:00AM) when it read "378." Hubby checked her again and she was 98 (4:00 AM, not sure what Dex said) but he turned her basal way down and when I got up and checked her at 7:00 she was 157 but Dex was reading "high" again. Thoughts? What is the best thing to do in this situation? I did not correct it for fear of a sensor error. The 12 hour enter BG will fall while she's in school and she doesn't wear it to school. We only use it for nighttime at the moment... Thanks!