Is there any self serve car wash place in Hong Kong?

Is there any self serve car wash place in Hong Kong?

I want to wash/spray my car with a water hose myself, but was told it's against the law to wash my car with a water hose on the street...

is atuo care beauty shop the only place i can get my car washed? how about if i just want to spray it with water daily? i don't want to use detergent to wash it everyday!!

any good advice on this? thanks