FreeStyle Libre Gave Me False Low Readings - Failed on the Second Day of Use

I’ve been using the FreeStyle Libre sensor, and I recently ran into a concerning problem that’s making me doubt the product. At night, the sensor is showing some pretty low numbers, like 52–55, but when I do a finger-prick test, it says around 180. This mismatch goes on all night, and sometimes it even occurs during the day. Also, the sensor occasionally just stops working and shows a “Replace Sensor” warning, even though I’ve only been using it for two days. It's pretty concerning to depend on something for tracking health and not feel fully confident in it. I'm a bit confused about what to do when a sensor fails this soon. I really hope Abbott gives clearer instructions and improves quality control for a product that's super important for managing diabetes.