As a restaurant owner, you understand the close link between cleanliness and your brand's reputation. People are sensitive about the condition of the environment where they eat. You ought to keep the place clean to avoid problems with the health department and to attract and retain clients. It is always advisable to hire cleaning experts as opposed to having your staff handle the cleaning themselves.
Professional cleaning yields better results than doing it yourself because the cleaners have the right tools and sufficient time to do a thorough job.