Areas that partake in food preparation, such as a bistro, have extremely strict standards that are enforced by the local health department authorities. If they fail these standards, then the business owners run the risk of having their businesses shut down completely because of a bad health grade. Cleaning protocols of the normal standards sometimes are not enough, because there are in fact surfaces that cannot be reached when it comes time to clean. This is also the same for bacteria that exists within the air, that settles on clean work stations, because the job just was not enough.