Agreed 100%.I've done a bit of research on paid advertising and I'm not sure FB is best for cleaning type services unless you have a promotion/offer that really stands out. You are trying to grab people's attention from their newsfeed scrolling when they may have no interest in your service. If you were trying to sell some sort of unique product that no one knew about, maybe getting exposure via FB ads would help. For something like cleaning, you want to put yourself in front of people who need cleaning. So, paid ads on Google (or other search engines) or working on search engine optimization may give better results so that you show up for people searching for exactly what you are offering.
That's my $0.02