How should staff verify the correct strength of chemical sanitizer on a food-prep surface?

Using a test kit to check the sanitizer's concentration is the most reliable method to verify the correct strength of chemical sanitizer on a food-prep surface. Test kits are specifically designed to measure the concentration levels of sanitizers, ensuring that they are at the appropriate strength to effectively reduce harmful microorganisms without leaving harmful residues on food-contact surfaces.

This method provides quantitative results, allowing staff to determine whether the sanitizer has the adequate concentration necessary for effective sanitation. It eliminates guesswork and promotes food safety by ensuring compliance with health regulations regarding sanitizer concentration.

Relying on estimations based on color or visual observations of foam is not a dependable approach, as these methods can be subjective and lead to inaccurate conclusions about sanitizer effectiveness. Referring to product instructions is important for understanding how to use the sanitizer but does not confirm its current concentration on the surface. Therefore, using a test kit is the best practice for ensuring that food safety standards are met.