Hello
@rebetic , and welcome
Call Abbot, and tell them you have a faulty sensor - they'll probably send you a new one, without any costs for you. Save your old sensor, though, because you will surely have to send it back... (no cost there involved, either)...
Edited to add a little P.S. If you have a glucose meter (I hope so), then do check, that your sensor does give false readings, and check it as soon as possible, please...