Why are these sudsy roadside stops one of the fastest growing industries in America? Zachary Crockett takes a look under the hood. RESOURCES:"Private Equity Wants to Wash Your Car," by Miriam Gottfried (The Wall Street Journal, 2022)."California Labor Commissioner Recovers $282,000 for Car Wash Wage Citations," State of California Department of Industrial Relations News Release (2022)."Sgt. Clean’s Future Shines Bright Thanks to Subscription Model, Strong Reputation," by Vince Guerrieri (Crain's Cleveland Business, 2018)."One California Drought Winner? The Local Car Wash," by Lauren Sommer (Marketplace, 2015).Sonny's CarWash College.