Your useless information for this week.
Dry cleaning was discovered by accident. On December 28, 1849, a tailor by the name of M. Jolly-Bellin, knocked over a lamp containing turpentine and oil. Some spilled on his clothes and he noticed that it had a cleaning effect.
I can’t think of many other industrial liquid combinations which could not only be safely spilled on a person’s clothes, but result in cleaner clothes.