Patent ID: 7785109

Claim:
A method for improving cleaning of an environment comprising: (i) applying a transparent marker to one or more target sites located on one or more surfaces within an environment, the transparent marker capable of being viewed when exposed to ultraviolet (UV) radiation; (ii) determining if the transparent marker remains on the one or more target sites after one or more opportunities to clean the one or more surfaces by one or more environmental services staff members; (iii) establishing a quantitative baseline level of cleanliness for the one or more surfaces within the environment, the quantitative baseline level of cleanliness being based, at least in part, upon steps (i) and (ii); (iv) instructing the one or more environmental services staff members on cleanliness issues; and (v) evaluating whether the cleanliness of the environment has improved after instructing the one or more environmental services staff members by repeating steps (i) and (ii) to establish a post-instruction level of cleanliness and comparing the post-instruction level of cleanliness to the quantitative baseline level of cleanliness.