Which of the following is NOT a requirement for a salon's cleanliness?

In the context of salon cleanliness standards, proper equipment storage is crucial to maintaining a sanitary environment. Storing equipment in open areas can lead to contamination and does not align with best practices for cleanliness. Instead, equipment should be stored in designated, clean, and closed areas to minimize exposure to dirt, dust, and potential pathogens.

The other options, such as regular equipment disinfection, proper waste disposal, and the use of protective gear for staff, are all essential requirements for ensuring a safe and hygienic salon environment. Regular disinfection helps prevent the spread of infections, proper waste disposal prevents clutter and potential health hazards, and protective gear ensures the safety of staff while performing services. Therefore, the correct response highlights that equipment storage in open areas is not a requirement, emphasizing the importance of appropriate storage practices for maintaining salon cleanliness.