If a food contact surface is in constant use, how often should it be cleaned and sanitized?

Food contact surfaces that are in constant use should be cleaned and sanitized every 4 hours to prevent the growth of bacteria and other pathogens that can cause foodborne illness. To clean and sanitize a food contact surface, you should first remove any visible food and debris. Then, you should wash the surface with a detergent solution. Finally, you should sanitize the surface with a food-grade sanitizer.