Unlike cats and germaphobes, automobiles need to be reminded to wash themselves. Drop a blatant hint to your lazy ride with today's Groupon to Metro Car Wash. This Groupon is valid at two locations. Choose from the following options:

• For $17, you get an interior or exterior detail (a $35 value).
• For $21, you get five full-service car washes (an $8 each; a $44.95 total value).
• For $35, you get three signature-service car washes (a $25 value each; a $75 value).

Metro Car Wash's meticulous technicians and loaded wash and detail packages have earned it the title of Tucson Weekly's Best Car Wash 2011. Each detail kicks off with a signature-service wash, which expunges exterior dirt, shines tires, and applies paint protection before technicians disinfect cup holders and feed cough drops to throaty mufflers. A high-pressure blowout knocks dust from beneath seats and vents during the interior detail, and vinyl snuggles up under blankets of UV protection treatments and moisturizers for that crisp new car feel. As the exterior detail unfolds, the staff hand-applies coats of carnauba wax and armors the wheels with wheel wax, which protects them from dirt and undead roadkill. Techs then dress the exterior vinyl in UV protection and moisturizers to accent the well-groomed façade.

Customers equipped with wash packages can swing by either of Metro Car Wash's two locations any day of the week, whether they're redeeming a signature service wash or stopping for a full-service wash, which includes a sanitizing car wash, interior vacuum, dusting, and window cleaning.

Though Metro Car Wash sometimes features a discounted price online, this Groupon still offers the best deal available. Metro Car Wash's prices vary throughout the week.