Cleaning Cleaning is the process of removing unwanted substances, such as dirt, infectious agents , and other impurities, from an object or environment. Cleaning occurs in many different contexts, and uses many different methods. Several occupations are devoted to cleaning.Contexts Cleaning occurs in various commercial, domestic, personal, and environmental contexts, which differ in scale and requirements. Cleaning is broadly achieved through mechanical action and/or solvent action; many methods rely on both processes. Washing , usually done with water and often some kind of soap or detergent * Pressure washing , using a high-pressure stream of water Abrasive blasting , typically used to remove bulk material from a surface, may be used to remove contaminants as well Acoustic cleaning , the use of sound waves to shake particulates loose from surfaces * Ultrasonic cleaning , using ultrasound, usually from 20–400 kHz * Megasonic cleaning , a gentler mechanism than ultrasonic cleaning , used in wafer , medical implant , and industrial part cleaning Carbon dioxide cleaning , a family of methods for parts cleaning and sterilization using carbon dioxide in its various phases Dry cleaning of clothing and textiles, using a chemical solvent other than water Flame cleaning of structural steel with an oxyacetylene flame Green cleaning , using environmentally friendly methods and products Plasma cleaning , using energetic plasma or dielectric barrier discharge plasma created from various gases Sputter cleaning , performed in a vacuum by using physical sputtering of the surface Steam cleaning , in both domestic and industrial contexts Thermal cleaning , in industrial settings, involving pyrolysis and oxidation Wet cleaning , methods of professional laundering that avoid the use of chemical solvents Cleaning by item Some items and materials require specialized cleaning techniques, due to their shape, location, or the material properties of the object and contaminants.Buildings and infrastructure Several occupations involve cleaning, either in their entirety or among other duties. Cleaner Housekeeper Janitor Maid General Cleaning, for other uses of the term Cleanliness , an abstract concept for a state that may be achieved by cleaning Cleaning agent , substances used in cleaning Contamination control , of which cleaning is a partBiology and health Cleaning symbiosis , among living creatures Hygiene, a set of practices performed for the preservation of health Sanitation , techniques to protect human health by providing a clean environment Sterilization, the elimination or deactivation of biological agents Organizing Professional organizing , improvement of organizing systems and processes Sorting , any process of arranging items systematicallyOther contexts Cleaning event , in which solar panels on planetary rovers are cleaned by wind Cleaning validation , used to assure that manufacturing residues are removed Cleanroom , a room with low levels of particulates, used in specialized manufacturing or research Priming, cleaning of scientific equipment with the same chemical that will be used in an experiment
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