I see the following message when using the Lingo app: Replace Biosensor What it may mean: The App has detected a problem with your Lingo Biosensor. What to do: Apply and start a new Lingo Biosensor. Need help? Please submit your request here. Related to Troubleshooting Related articles What if my biosensor comes off too soon? How can I update my payment details? I see the following message when using the Lingo app: Check Biosensor I see the following message when using the Lingo app: Biosensor Already in Use I see the following message when using the Lingo app: Signal Loss