One of the methods we use to detect contamination not visible to the naked eye is by using black lights. This photo was taken in a bathroom that was 'seemingly' clean. You will never fully get rid of restroom odors unless residual urine is removed.
A battery operated, portable black light can highlight areas that your cleaning service is missing. And I can speak from experience, this is a very powerful teacher. Partitions and floors around the base of toilets are chronically neglected areas that get splattered by flushing.
How clean are YOUR restrooms? Call us and we'll inspect your restrooms with our black light as well as other tools to prove the results you're really getting.