How did Marinana lose her job?

Back in the early 80s, Marinana (not her real name) was the most reputable restaurant dishwasher around. Of her entire career, never once did she chip any of her bowls, plates and stuff and all her final washed products were spick and span without ever a stain. Every restaurant in town wanted Marinana (not her real name) to wash their dishes. A few years later, the dishwashing machine was invented and entered the market. That was how Marinana (not her real name) lost her job.