Sleep not recording on Sense 2

[LindeBH]

I am 85 years old,  and my Sense 2 does not record my sleep sessions.   Even though I am in bed for at least 8 hours,  it says I got no sleep.   The device is properly positioned on my non dominant wrist.  Help!

Moderator edit: clarified subject.

[ManuFitbit]

Welcome to the community forums @LindeBH. 

Thank you for providing the details regarding this difficulty with your Sense 2. 

For the most accurate results, it's best to have about an hour of complete stillness before you go to bed. This allows the device to properly register that you're asleep and begin tracking. 

Additionally, please keep in mind that certain factors can prevent your tracker from recording your sleep accurately. To ensure optimal performance, please make sure of the following:

• If you slept in a position that prevented your device from getting a consistent heart-rate reading or wore it too loosely. For best results, wear your device as described in this help article.
• If you slept for less than 1 hour for sleep patterns or less than 3 hours for sleep stages.
• If your device’s battery is critically low.

If you haven't done so already, please follow the steps listed here below: 

1. Complete a restart procedure.
1. Try adjusting the sleep sensitivity on the Fitbit app and check if you continue to have the same problem.

[dminsd2001]

Hi, I have the same/similar problem and tried a number of things based on what I read on the posts. 

changed setting to sensitive.  Restarted watch and app.  Moved the watch up a bit so it’s 2 finger width from wrist.  Set sleep schedule.  
Have a low key hour before bed.  

- still it records either the first or last half of my sleep. It’s a new watch (1 week) and I wonder if I should return it.