Automobile filth takes inspiration from the fast-paced vehicles it lives on, meaning it will inevitably road-trip off the car and onto nearby children or puppies. Blast dirt before it migrates with today's Groupon: for $50, you get a 100-day pass for unlimited Extreme exterior car washes at Waves Car Wash in West Roxbury (a $116 value).

Extreme exterior packages give motor-powered buddies more than a simple shower. They’ll get a pre-soak, an underwash for dirt hidden by petticoats, a wheel brightening, a rust-inhibitor treatment, Blue Coral sealer wax, Blue Coral triple foam, a spot-free rinse, a tire shine for car-sandal season, and a Rain-X treatment to help repel elemental buildup in inclement weather, blinding the sun and impressing local mail carriers. Windows are scrubbed until they perform as mirrors, and mirrors are polished until the objects in them appear cleaner than they may be.

An unlimited regimen of thorough bathing will prettify your ride for 100 consecutive days after redeeming this Groupon online, or until it’s fully potty trained.

Using three 1,500-gallon reclaimed water tanks to cut down on H20 waste, 160 solar panels to supply 20% of its power, and mostly biodegradable chemicals to spit-shine vehicles, Waves abides by environmentally friendly cleaning schemes and avoids contributing to the pools of besmirched soap muck that clog most streets.

Car washes help prevent the passing judgment of strangers, potential dates, and well-kempt squirrels, and they are a necessity if you don't want to stink up the entire drive-thru theater, thereby ruining the smell-o-vision version of Saw XVIII.