What common effectiveness test can be used to check for clean glassware using salt?

The effectiveness test using salt to check for clean glassware is based on how well the salt adheres to the surface of the glass. If the glassware is properly cleaned, the salt should adhere evenly across the entire surface. Conversely, if there are residues or spots that are not fully cleaned — such as oily or grimy areas — the salt will not stick to those parts, indicating areas of concern.

When salt fails to adhere in certain areas, it signifies that the glassware has not been thoroughly cleaned. This can often indicate the presence of detergent, oils, or other residues that prevent the salt from sticking. Thus, observing where the salt does not adhere helps assess the cleanliness of the glassware effectively, making this method a useful test in maintaining proper hygiene standards in beverage service.