Without modern car washes, drivers would have to rely on periscopes or neck-elongation exercises to see around their gak-strewn windshields. Celebrate unobstructed foresight and hindsight with today’s Groupon: for $35, you get a two-vehicle mobile wash from Finish Line Mobile Wash & Detail, servicing Nassau and Suffolk County (up to an $80 value).

Finish Line's roving band of vehicular grime fighters takes aim at besmirched bumpers and grills with full-service hand washes. Its diligent staff travels to automobiles parked at residential and commercial locations and erases the evidence of dirt and drag races with smack-talking segways.

The filth inquisition treats two vehicles to a suds massage, interior vacuum, tire shine, hand dry, and more. Finish Line personnel arrive equipped with their own source of water and electricity, along with cleaning supplies such as a hot-water pressure washer, which harnesses steam to release gunk and clingy construction horses. Schedule an appointment over the phone or online to mollycoddle your cars.