What happens if I lose or break my Propeller sensors? Mandy 31 July 2017 21:47 Updated Follow Not to worry. Simply call or email us so we can get you what you need. Related articles I have changed medications. How do I get a new sensor? What do I do with my old sensor? How do I know if my sensor has stopped working? How to Remove Your Sensor for MDI My sensor has stopped syncing with my smartphone or tablet. How do I fix this? Why is my sensor beeping? How do I turn off Reminder Sounds? Comments 0 comments Please sign in to leave a comment.