Self-cleaning refers to the ability of a certain piece of equipment or material to clean itself without the need for external intervention or the use of chemicals such as detergents for cleaning. This capability is often achieved through special surface treatment or material preparation techniques, which can reduce the frequency and cost of cleaning and increase the service life and performance of the equipment or material. Common self-cleaning materials include self-cleaning glass, self-cleaning ceramics, self-cleaning coatings, etc.