It's a cleaning, not a resetting or a purging! They're not going to recollect all of your personal belongings and go "This is more than the standard allotment of chairs". They are going to go "You spilled grape juice on the carpet. Your efforts to clean it are unacceptable" and deep-clean the carpet.
They're a maid service coming into your house -- and a repairman and a plumber and a pest remover -- all in one. And, like in any intensive cleaning situation, you have to get out of their way in order for them to clean, but when you come back to your house, they're not going to have walked off with your jewelry.
Everything you own will be left alone, unless you left a huge chunk of uranium-235 lying around somewhere, in which case Acumen might be concerned. Whatever you own will be precisely where it was, but it will be much cleaner.