Charge 6 not tracking sleep

[Stuckyville]

Most days my Charge 6 reports Sleep Duration - No Data.  Even the days it does record data, it is wildly inaccurate, either just recording the first hour or two after going to bed or the last hour or two before getting up. Sometimes just an hour or two in the middle of the night.  But mostly "no data".

My wife also has a Charge 6 and regularly reports between 7 and 8 hours of sleep.  So the other night we switched devices.  With that, of course, I was recording on her phone, and she was recording on mine.  The next morning, my phone/device reported she had slept over 7 hours, and her phone/device reported I had slept just over an hour.  So it would appear that the problem is not my device or app installation but me or the way I'm wearing the device.  I wear it comfortably snug, not tight, just above my wrist bone on my left (non-dominant) hand.

I like (sarcasm) the description of sleep tracking given by the app:  "Sleep tracking uses body signals collected by your device to estimate your sleep metrics."   I wonder if it could be more vague and less informative about these "body signals" and the method of "estimat(ing) you sleep metrics".  Gee, if I hadn't read that I would have thought it was just making it up out of the ether . . .

BTW, when I'm on the treadmill or stationary bike, the heart rate sensors there track to within 1 beat per minute with what the Fitbit reports, so I feel comfortable that the heart rate monitoring is reasonably accurate.

[FatimaFitbit]

Hi there @Stuckyville! It's great to see you here in the Fitbit Community!

Thank you so much for informing us about this situation and for all the details provided.

Have you selected the option "Begin Sleep Now" instead of simply wearing your device to bed? Did you charge your Charge 6 before sleeping?

I suggest you try to do the following:

• Restart your Charge 6: 
  • Connect your device to the charging cable. 
  • Press the button located on the flat end of the charger 3 times with one-second pause between each press. Then wait 10 seconds or until the Fitbit logo appears.
  • Another way to restart your device is to unplug it, wait a second, and plug it back in. Repeat this process 3 times in an 8 seconds interval and then wait 10 seconds until the device restarts.
• Check if your sleep setting is set to Sensitive. If it is, change it to Normal. 
• You might have 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 higher on your wrist (about 2-3 finger widths above your wrist bone). The band should feel secure but not too tight. Learn how to wear your device for optimal sleep tracking.
• For more information please see: What should I know about Fitbit sleep stages? and How do I track my sleep with my Fitbit device?