Been having a problem over last week with sensor. When I scan it was taking ages to register. It kept saying as well cannot scan. Rang consumer line in week and they said there was a problem with app. Would be sorted soon. Today had to change sensor and doesnt register at all. Have rung again and they took me through a sequence to delete cache on phone still hasnt worked. Back to finger pricking at moment. Wonder if I sshould delete app and reinstall. They are sending me a reader. Any ideas?