Free Style Libre 2 unreliable

Hi Just to make it known my wife has been using the Free Style Libre sensor to measure her blood glucose level. She has used many of these items in the past and it must be said about 50% of them either do not work or are inaccurate. Luckily Abbotts are very good at replacing them at no cost. It is however a serious health risk when the readings are as inaccurate as they can be at times.