Data inaccurate

Hi,

I have a Lily 2 sonce January and I was waiting a bit to see how it would improve.

It is obvioulsy inaccurate in taking some of the data.

The sleep data is wrong. It is saying I'm asleep when I am not.

The number of kilometres walked during the day is also quite inaccurate. I was on holiday with 2 friends who have other garmin watches, and for example, one day my watch said 31,8km (whoch seemed quite high), while my two different friends' watches said 19.8km.

Is there a way to improve that?

Thank you