Charge 5 won't work on my wrist

[SunsetRunner]

• My Charge 5 does not  work on my wrists 
• It works on my fingertips on my hand below wrist 
• Does not for sleep 
• It registers steps ect on wrists not app
• I have deleted and reinstalled every thing
• I am using Samsung Galaxy A  G  on Telstra network AU

Moderator Edit: Clarified subject

[Talahthas]

Welcome to the Fitbit community, @SunsetRunner!

Sad to hear that you're having issues with your Charge 5. As a first approach to hopefully get things fixed, I'd suggest restarting it. Before doing so you should make sure you've synced your device to not lose any data tracked so far. Also you should verify that the charging contacts on your device are clean and the charging pins on it's charging adapter are clean as well and can move flawlessly. In doubt, please have a look here:

How do I clean my Fitbit device?

Next please closely follow these instructions as timing is crucial for this procedure:

1.) Connect your Charge 5 to the charging cable which has to be connected to a reliable power source.
2.) Press the button located on the flat end of the charging cable 3 times within 8 seconds(!), holding each press for about 1 second(!).
3.) Wait around 10 seconds until the Fitbit logo appears on your device's display.

Sometimes it takes more than one attempt to restart Charge 5. So, before throwing the towel, please give it another try.

I'd also like to point out that having a tattoo where you're wearing your device might have a negative impact on heart rate tracking and thus for sleep tracking. The same goes for a very hairy forearm.