What is a requirement for a salon's sanitation practices?

Disinfecting tools after each use is a fundamental requirement for a salon's sanitation practices. This step is crucial to prevent the spread of infections and ensure the safety and health of clients. Tools used in the application of eyelash extensions, such as tweezers and scissors, can harbor bacteria and other pathogens if not properly disinfected. By following this practice, salons uphold high hygiene standards and protect both clients and staff from potential health risks.

The other choices suggest practices that compromise sanitation. Using only brand-new equipment is impractical and unnecessary, as proper disinfection of reusable tools is sufficient. Storing used towels openly can lead to contamination, as they may come into contact with dust, bacteria, or other contaminants in the environment. Lastly, using the same towels for multiple clients without proper washing degrades hygiene and can easily transmit pathogens between clients. Therefore, disinfecting tools after each use is the correct approach to maintaining a safe and hygienic salon environment.