Actually it is, constantly too.
Girls are keeping masks on around each other, and they have the same room for an entire shift.
They disinfect the room before the first person of the day, and after every visit there after.
The girl working the front, is doing the same with door handles, and if anyone sat down.
Certainly I'd consider the spa much more cleaner and safer than a grocery store, mall or gym, and far less traffic than any of those.
As I said, the spa is on par with many other things like a dentist, optometrist, or RMT where its close and personal attention.