Cleaning my Apple Watch - eek!

What kind of strap/band are you using, if the sport strap/band the giving it a wash in hand liquid soap or mild detergent should do know harm, the watch its self many shower with their watch on, I would not recommend it, but some do it, a wipe with a damp cloth will clean it well enough.

Here are Apple's recommendations regarding cleaning:

Cleaning and wearing Apple Watch - Apple Support

In my non-professional opinion, these cleaning restrictions seem no more restrictive than would apply to some other type of watch.

I would call Apple and see what they recommend in your case. There may be some sanitizers that have been tested.

George

Try an alcohol wipe.

If you need to immerse the watch to clean it, then I think, unfortunately, you need a fully waterproof watch.