Which essential item should Leslie include in their hygiene pack as an eyelash technician?

While a mouthwash is indeed a hygiene product, in the context of an eyelash technician's hygiene pack, a hand sanitizer is particularly essential. Hand sanitizer is critical for maintaining proper sanitation practices, particularly in a setting where the technician is working closely with clients and handling tools and products that may come into contact with skin and eyes.

Good hand hygiene is fundamental to preventing the spread of germs, especially in beauty services where the potential for transmission of bacteria and viruses can occur. Using hand sanitizer before and after each client can help ensure the technician maintains a clean working environment and reduces the risk of infection or irritation for the client.

On the other hand, scissors, mouthwash, and a personal towel, while they have their own uses, do not directly address the immediate hygiene needs that are vital in an eyelash extension or brow service.