Deep-cleaning is a thorough cleaning process that goes beyond the regular cleaning of a surface or object. It involves scrubbing and cleaning with special attention to hard-to-reach areas, such as cracks and crevices. The term 'SCRUB' is often used in deep-cleaning, which means to vigorously rub a surface with a brush or other abrasive material in order to remove dirt and grime. Deep-cleaning is often used in the home, but it can also be used in commercial settings, such as restaurants and hospitals.