I hired a cleaning service through Groupon once. I opened the door to four people walking right by me without saying a word (they didn't speak English), and one "front person" who barely spoke. I had never had a cleaning service come in before, so I had some questions. I was also expecting one person that I could follow around the house to make sure they didn't take anything, but all I could do now was have faith in my fellow humans (in an industry notorious for theft). That was very off-putting, and I can't see how anyone would hire someone to clean their house whom they didn't completely trust. I know people do, but I will never again.

EDIT: Just saw your response to the other comment where you thought it was dry-cleaning. It may well have been, but I'll leave my story here anyway, since it's sort of in context.