Self-cleaning materials are designed to maintain cleanliness without the need for manual cleaning. These materials often use special coatings or structures that repel dirt, water, and other contaminants. When dirt comes into contact with these surfaces, it can easily be washed away by rain or water, keeping the material clean and reducing maintenance efforts. One common example of self-cleaning technology is found in lotus leaves, which have a unique surface structure that allows water droplets to pick up dirt as they roll off. Researchers have mimicked this natural phenomenon to create self-cleaning surfaces for various applications, including building materials and textiles.