Apple Watch frozen

Have you tried the steps in the ';How to turn off Water Lock and eject water' section of:

How to use Water Lock and eject water from your Apple Watch - Apple Support

If so, your best option may be to make an appointment at the Genius Bar in an Apple Store near you and let them look at it:

Genius Bar Reservation and Apple Support Options - Apple

I have had this problem too. I try to press the water lock « drop » in the Control Center on the watch but it won’t turn blue. It’s as if the moisture or water in the watch is preventing the screen from responding to touch. It would be helpful if one could use another method to force the water lock on, like double or triple tapping or asking Siri. Thanks.