Apple’s docs state not to wear it in these circumstances. You can find them somewhere.
Anecdotally, I’ve never taken mine off at the spa. I go frequently, and do multiple bouts of 20 minutes in steam, sauna, hours in hot water, etc. I’ve not had an issue. The only place I ever take it off is at the beach, as the sand will destroy it.
Apple’s docs state not to wear it in these circumstances. You can find them somewhere.
Anecdotally, I’ve never taken mine off at the spa. I go frequently, and do multiple bouts of 20 minutes in steam, sauna, hours in hot water, etc. I’ve not had an issue. The only place I ever take it off is at the beach, as the sand will destroy it.