Just as different food materials require special cleaning, the surfaces of foodprocessing equipment need thorough and frequent attention. The cleaning of equipment,as well as a facility's walls and floors, must take into consideration of the chemical andphysical properties of both the surface to be cleaned and the type of soil. Food plantoperators generally call on detergent manufactures for expertise in establishing highlyeffective cleaning procedures since these further depend on detergent concentrations,temperatures of application, order of application where more than one cleaning aid isused, and other variables.