Hi all newly registered as im having issues with my free style libre I've been using it for last 4 months the last 3 out of 4 sensors I've had issue with being that the scanner nor my phone is recognising the scanner. It starts up says scan wait 60 mins then says no sensor found ? I'm a nurse so I know its on properly and the cost of these is what erks me more but also that I have hypoglycaemia with no notice so the fact they aren't working is a safety issue any help please?