When should hands be washed after cleaning?

Hands should be washed after cleaning to ensure that any contaminants picked up during the cleaning process do not transfer to food or food preparation surfaces. This is particularly important after tasks like mopping, where dirt and cleaning chemicals can accumulate on the hands. Washing hands immediately after completing these tasks helps maintain proper hygiene and prevents cross-contamination in the kitchen or food service area.

The other options represent scenarios where handwashing is also important, but the focus of the question is on the timing related to cleaning activities. Before starting to mop, a worker should ideally be starting with clean hands, but the question specifically asks about actions taken after cleaning. Washing dishes and taking out the trash do also require handwashing afterward, but the question emphasizes the need to wash hands after cleaning specifically linked to mopping.