Cleaning frequency of machines for ware-washing is at least every how many hours?

• A. Every 12 hours
• B. Every 6 hours
• C. At least every 24 hours
• D. Weekly

Answer: (C)

Regular cleaning of ware-washing equipment is essential to prevent soil buildup, biofilms, and to maintain effective sanitizing performance. The minimum baseline is to clean and sanitize the machine at least once every 24 hours. This daily cleaning helps ensure the wash and rinse tanks, filters, spray arms, and interior surfaces don’t accumulate residue that could contaminate future loads.

Cleaning more frequently (every 12 or 6 hours) might be needed in very high-use or high-soil situations, but daily is the standard minimum. Cleaning only weekly would leave too much time for buildup and could compromise food safety and machine efficiency.