An engineer’s perspective on cleaning efficiencies is scary on its own merit—and I’m certainly going to date myself here—but remember the old boil tanks sanitation was so proud and protective of? They were primitively constructed, scary beasts with some valves and piping welded into the underside to act as a drain, which deposited its contents directly onto the floor. The large, wide-open steam pipe would come from above and was inserted maybe 18 inches into the deep, throttled merely by a gate valve. Its only intent was to superheat a caustic concoction that could eat chrome off a car bumper (yes, car bumpers were chromed back then…).
Maintenance was given the daunting task of dismantling guards, removing catch pans and taking off the table top chain (which used to be made of steel), and sanitation would load it all up onto a pan truck or ingredient cart, bring it to the “wash room” and boil it for several hours. Occasionally, depending on the materials, some of the items would no longer exist as they were literally boiled to death. Primitive as it was, whatever made it through the bath had nothing on it. Perhaps slightly rusted or corroded, but it did the job and we didn’t kill anyone with our products.