Under what condition should sanitizer be changed?

Sanitizer should be changed if it is dirty and every two hours to ensure effective sanitation in food service environments. Over time, sanitizing solutions can lose their potency due to contamination from food particles, debris, or physical exposure that can lead to reduced effectiveness against pathogens. Changing the sanitizer regularly helps maintain its disinfecting power and guarantees that surfaces and utensils are appropriately sanitized.

Using the sanitizer solely based on it smelling bad does not ensure safety, as the efficacy of the sanitizer cannot be determined by smell alone. Additionally, changing it only when switching food types does not account for the accumulation of dirt or the degradation of the sanitizer's strength over time. The idea that sanitizer can be used indefinitely ignores the necessity for regular maintenance and monitoring to ensure hygienic standards are met. Thus, the recommended practice is to replace the sanitizer when it appears dirty and at regular intervals, such as every two hours, to maintain a safe food preparation environment.