Wear food-service gloves when preparing sandwiches. Change gloves frequently, and always put on fresh gloves after handling dirty dishes or trash.
Do not allow a counterperson making sandwiches to handle money.
Wipe knives with sanitizer solution between each task.
Keep perishable fillings, spreads, and garnishes refrigerated during the service, and keep the lid of the sandwich/salad unit closed when not in active use.
Wash and sanitize the tops of squeeze bottles after each service. Empty, wash, and sanitize squeeze bottles on a regularly scheduled basis, at least once per week.