Inspire 3 is not tracking my steps accurately

[KLE92]

Recently purchased an inspire 3 as wanted to track my steps and found the sleep score info interesting. 
However, the step count on mine is quite honestly, ridiculously inaccurate. For example; led in bed watching a film racked up 200 steps and cutting my dinner up racked up 50 steps. 
I have tried/done:

- correct weight and height 

- adjusting stride length 

- restarting Fitbit 

- changing to ‘dominant’ wrist on settings 

despite these changes it is still being totally incorrect and inaccurate. 
Anyone with any tips would be most appreciated as it’s driving me a bit bonkers now and will return if the issue can’t be fixed 😞 

Thank you in advance x

Moderator Edit: Clarified subject

[Gr4ndp4]

Hi, @KLE92 welcome to the community, you may find this article of interest How does my Fitbit device calculate my daily activity? - Fitbit Help Center . The numbers you mention are quite modest and could be accounted for by random movement of your arm. There are examples of much larger discrepancies where pushing a shopping trolly or stroller does not register steps. The other extreme is where someone is typing or driving and the very frequent movement triggers a "step". All wearables are affected in some way or another. This old article from a third party provides more thoughts on the issue How to make your fitness tracker count steps more accurately - The Verge .

I hope this helps.

Cheers