Tub Clean is a cycle on some LG washing machines that helps to clean the inside of the washing machine tub. It uses hot water and a combination of bleach and water to remove dirt, detergent residue, and other buildup from the tub.
Tub Clean is important because it helps to keep your washing machine clean and free of bacteria. It can also help to prevent odors from developing in your washing machine. It is recommended to run the Tub Clean cycle every month or two to keep your washing machine in good condition.