There is no correlation between the visual appearance of a surface and its level of cleanliness. Surfaces that may appear clean can be laden with bacteria. When it comes to cleaning service results, the only way to determine how clean a surface might be is to conduct tests that count the bacteria.
The cleaning methods of Washroom Wizard! have been subjected to such tests. The results of these tests in one of our client locations are below. How many other cleaning services do you know of that conduct such tests; and then publish them?