how often is cleaning done in a professional kitchen?
I have worked in two professsional kitchens. The main kitchen itself (all the work tables, stoves, floors, refrigerator fronts and so on) is cleaned after each service, and very thoroughly each night with hot soapy water and sometime sterilizing solution. The insides of refrigerators and other storage areas don't need to be cleaned that often because everything in them is in sealed containers. They should normally be emptied and wiped out at least once a week, and of course immediately if there is any kind of spill.