It reaches the deep dirt and grime in your home and covers the areas that are not normally covered in the regular cleaning. Deep cleaning is normally carried out once or twice a month and it's highly recommended before a tenant moves in or out. Deep cleaning tasks often cover things like: full and deep dusting including all corners of rooms, inside and outside all windows, washing blinds, under the sink, cleaning behind appliances such as oven, refrigerator, washing machine, cleaning inside the oven and glass door, etc...