I would go with 1920 because it is mentioned a lot in Wikipedia
The show was an off broadway production based on the brady bunch
Acetone — Commonly used as a cleaner and in cosmetics that remove skin
oil. Hexane — Frequently used as a solvent for dissolving various types of
cooking oil. Carbon tetrachloride — Often used as a general cleaner in
numerous industries. Diethyl ether — Infrequently used to dissolve oils due to its low flash point.
