Home Button not working

this link tells you how to clean your watch - Important handling information - Apple Support

and this link too - How to clean your Apple Watch - Apple Support

there may be debris preventing the home button from working correctly.

If it is stuck, hold the watch at an angle (with the crown down) and run some warm water on the crown being very careful not to let any water into the watch....then dry it and try operating it.

Call Apple and see if they can fix it.

When you say not working in what way?

No worries. Glad you sorted.