Professional Carwashing & Detailing WashUSA. Westchester County Business Hall of Fame/Class of 2005. Best of Fairfield county : Fairfield weekly. The 10th hand wash location is opened in May in Stamford, CT. The 10 express wash location is opened in June in Hamden, CT. The 1st quick lube is opened in June in Hamden, CT. The 5th hand wash location in Darien CT closes in July. At this point Splash operates 9 hand washes.