there is a car wash located near lido main road. if you're coming from QEH direction, it will be on your left handside. once u reach the junction & traffic light to turn to KK high school, u r near already. don't turn into the junction just go straight n keep left. i haven't been there for some time but when i was there i used to send my car to wash. they charge premium compared to others like u said illegal immigrants but its worth it. u can also tell by the premium cars there.