So I just wanna make sure I’m correct on what you’re advocating.
Are you suggesting taking a squeegy to the AMP , then Squeegying the shower in the MP before showering ?
No , I think this is what should happen after your visit. So that when you step in a shower you know its clean.
In most amp the SP cleans up after the appointment. change sheets etc, also look at the shower. A quick cleaner spray, a squeegee, a rinse with a hand held and a squeegee wipe to get all the water off the walls of shower (takes about 5 min). Check the drain for hairs (clean out with throw away gloves). Any bathroom being used, by an AMP should be thoroughly cleaned at least once a day or twice depending on use. the squeegee thing is just a quick way to clean/disinfect the shower before the next user. That old tale of "Cleanliness is next to godliness....."
The question is do you like to shower in a place that has water on the walls of the shower.... my answer is no for me.