Is my son’s libre faulty?

[u/WitchAndTheWolves]

My 12 year old son has cystic fibrosis. His cf team want to check that he isn’t pre diabetic (as this can start in people with CF around his age) We had his sensor fitted by the CF hospital team today at 3pm. I was told to wait a while for it to calibrate before scanning. I have since scanned it a few times to see if it’s working but I keep getting a screen, after the scan complete notification, to replace the sensor.. then it goes back to this screen. Does this mean that his sensor isn’t working, or do I just need to wait a while longer for it to calibrate? The hospital have told me to contact them if there are any issues, but I want to be sure that this isn’t normal before potentially unnecessarily contacting them tomorrow.

[u/morbid909]

New sensors take 1 hour before they work and interact with the app. If it’s been longer than 1 hour since application and still get this message then it’s faulty. Sometime the needle part bends if it’s not flush when you fit it so doesn’t pierce the skin