What happens if I lose or break my Propeller sensors? Mandy 10 November 2019 22:22 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? MDI Sensor Technique How do I know if my sensor has stopped working? Mobile FAQ How to attach your Sensor for MDI with White Button Comments 0 comments Please sign in to leave a comment.