Machine dishwashing requires all of the following EXCEPT:

Machine dishwashing is designed to sanitize and clean dishes effectively through a combination of high water temperatures and specialized detergents. Understanding the requirements for proper machine dishwashing helps ensure that the process is both efficient and compliant with food safety standards.

The correct answer highlights that hand washing dishes before loading them into a machine dishwasher is not a requirement. In fact, machines are designed to handle both the cleaning and sanitizing processes without the need for prior hand washing of the dishes. The dishwashing machine itself generates sufficient heat and pressure to remove food residues and bacteria, making pre-washing unnecessary and potentially counterproductive.

The other options provided are indeed necessary components of effective machine dishwashing. Proper training ensures that staff understands how to operate the machine correctly, maintain it, and follow safety protocols. Routine checking for clogged spray nozzles or mineral deposit build-up is vital to maintain the functionality and effectiveness of the washing machine, as well as to prevent contamination. Lastly, machine dishwashers typically need to reach sanitizing temperatures of at least 180 degrees to effectively kill harmful pathogens on dishes and utensils. Thus, these elements are integral to ensuring that machine dishwashing is done correctly and safely.