Final answer:
Customers must take a clean plate each time they return to a self-service area for more food to prevent cross-contamination and maintain cleanliness.
Step-by-step explanation:
When customers return to a self-service area for more food, they must take a clean plate each time. This practice is in line with health and safety regulations to prevent cross-contamination and ensure personal hygiene. In a self-service environment, it's crucial to maintain cleanliness to avoid spreading germs. While other items like extra napkins, hand sanitizer, and new serving spoons also contribute to good hygiene practices, the clean plate is the essential item that customers should use each time they get more food.
It is important to always wash hands thoroughly and clean fingernails before beginning to prepare or serve food, after using the toilet, and whenever hands become soiled as part of the clean hands habit. Using items such as disposable cups, plates, trays, and cutlery helps in keeping the serving areas hygienic and reduces the risk of contamination.