Midland Carwash is the highest-rated self-serve car wash in St. Louis. Our exclusive products, together with our state-of-the-art facility, are designed to provide you with the best possible wash, shine, and spot-free rinsing. Pull Into An Available Bay! We are open 24 hours a day, 7 days a week! Midland Self-Serve Car Wash is constantly clean and well-kept. Only gentle cleaning solutions specifically developed for Missouri driving conditions are used. With equipment that is routinely serviced by our own fleet of skilled service professionals, we stand behind the safety of our washes. Come visit our 8-bay facility, which is well-lit, secure, and spotless!