Which of the following is NOT an indicator of effective cleaning?

The identification of presence of specific cleaning odors as not indicating effective cleaning stems from the understanding that, while some cleaning products have distinct fragrances, these odors do not necessarily correlate with the actual cleanliness of a surface. The absence of visible residues or unpleasant odors is typically a sign of effective cleaning, as is successful verification through objective testing methods and overall client satisfaction.

The reliance on specific cleaning odors as an indicator can be misleading. For example, a strong scent might simply indicate the presence of fragrance in the cleaning product, rather than a clean surface. It's possible for an area to have a pleasant smell but still contain contaminants or not meet thorough sanitation standards. This makes the presence of odors, particularly those not related to cleanliness, a poor metric for assessing if an effective cleaning process has taken place.