Professionals do deep cleaning of the house When it comes to keeping your home truly fresh and healthy, one big question we hear again and again is how often to deep clean house so that it feels clean, smells good, and reduces allergens and buildup. You probably already sweep, wipe, and tidy up most days. But deep cleaning goes beyond surface chores and into those hard to reach spots that make your home truly clean. Most homeowners on cleaning forums share similar routines.