When you want a better performance from any appliance its needs to be maintained & clean. Deep fryer is one of them. A commercial deep fryer is used daily basis. It needs to be cleaned frequently for better performance. Commercial deep fryers need frequent boil-out cleaning for better performance. Its means you will remove the oil from the fryer & add water. Heat the water boiling and boil water will clean the grime and stuck-on food. You need to boil out cleaning once a week for good maintenance.