Hand wash. Hand wax. That's what it says in bold letters right above the entrance of The Wash's modest, white concrete-block building. The staff keeps it as straightforward and simple as that. Car-wash technicians lather up and wipe down vehicles by hand, shine tires with Armor All, and vacuum interiors free of loitering carpoolers. Skilled in thorough detailing, they also condition leather and chrome and deodorize car cabins.