What must be done with lotion or liquid after it is applied to a patron?

When lotion or liquid is applied to a patron, it must be discarded immediately to ensure hygiene and prevent the risk of cross-contamination. This practice is critical in sanitation and safety protocols, particularly in settings like salons, spas, or healthcare institutions, where the risk of spreading bacteria and viruses is heightened. Using any leftover product on another patron could compromise their health and safety, as it can introduce pathogens or allergens that might have been present on the first patron's skin. Proper disposal of single-use products helps maintain a clean and sterile environment, which is essential for public health and sanitation standards.