Which of the following practices is not permissible in food service sanitation?

Using pesticides in the kitchen is not permissible in food service sanitation because it poses a significant risk of contamination to food. Pesticides are designed to kill pests and can leave harmful residues that may compromise food safety. Food service regulations typically dictate strict control measures regarding pesticide use, emphasizing the importance of preventing any chemicals from coming into contact with food, food preparation areas, or surfaces where food is served. This practice ensures that the food served to consumers remains safe and free from harmful substances.

While some practices listed, like cleaning utensils with abrasive scrubbers, disassembling equipment for cleaning, and allowing food handlers to wear jewelry, may have specific guidelines or may be subject to regulations, they do not inherently create the same level of immediate risk as introducing pesticides into the kitchen environment.