Abstract: Method for cleaning the floor and sub-floor region of a paint spray booth by flooding with a cleaning solution and allowing the cleaning solution to soak on the various structures for a preselected period of time. The drains, scrubber section, and conveyor openings of the floor and sub-floor region must be blocked off to prevent the cleaning solution from exiting the booth. This method does not require the manual cleaning of the floor and sub-floor region thereby saving labor costs.