Answer:
They washed them by hand. pg. 45
Step-by-step explanation:
I don't know if this is the story but check in the book or story they should have given you something to read
Uncle Zhang said. At night, Uncle Zhang and the other workers slept at the employer’s house, in a basement with no windows. “I’m basically a slave,” he cried. “I only got out today because Immigration came and raided us, so everyone had to flee through the secret tunnels!” “What secret tunnels??” I asked. He told us that inside the restaurant there was a closet in the kitchen with a white apron. Behind the white apron, there was a button. If you pushed the button, the closet wall would open up and you could crawl out. The secret tunnels led to hiding places and directly outside. “We never thought it would happen but today, Immigration showed up,” Uncle Zhang said.