Whether tending to a lime-green Lamborghini Murciélago, a sleek Harley Davidson, or a family minivan, the technicians at Metropolitan Auto Detailing begin each scrub down the same way: with a 55-point inspection. Based on their assessment, the techs send their microfiber chamois on search-and-destroy missions that eradicate dirt through basic exterior hand washes or detailed shampoo and clay-bar treatments. They break out the vacuums and machine polishers as drivers take in TV and Wi-Fi in the waiting room, or pack up their gear and sojourn to homes, saving cars the trouble of climbing out of their owners’ bed.

But the crew's cleanliness mission doesn't stop at bumpers and wheel wells; they keep an eye on the local water supply by mainly using biodegradable cleansers and products from Griot's Garage, Meguiar's, and 3M that eschew the silicones and petroleum distillates of other cleaners.