After having to exchange my faulty iPhone 6 , I found that my Apple Watch is unresponsive to touch, if I try to enter its settings.

Hi

Try restarting or, if that doesn't help, force restarting - your watch:

- Restart: press and hold the side button until you see the Power Off slider; drag it to turn off; press and hold the side button until you see the logo.

- Force restart: press and hold both the side button and Digital Crown for around 10 seconds, until you see the logo.