Clean linen protocol involves the use of fresh, clean linens, towels, and drapes for each client. After each use, linens should be laundered with a high-temperature wash and a disinfectant detergent to kill any bacteria, viruses, or other pathogens. This practice ensures that clients have a hygienic experience and prevents the spread of infections. Proper linen management is crucial in maintaining a clean and professional environment in the treatment rooms.