It is a pretty good marketing ploy to attract customers with promos and packages that are both affordable and light-natured. Aside from the free self-service vacuums, you can provide free car toys or promos like the one I passed by when I was on my way to my grandma. The car wash had a "The Three Plus One Service." You get to have one free car wash after going through three car washes within a month.
Best Car Wash Phoenix 2011 - Clean Freak Carwash
Keep your ride clean for a freaky low price at Clean Freak Carwash on the corner of Seventh Avenue and Van Buren. Get in and out in three minutes with its $5 car wash, or sign up for a monthly plan and get unlimited car washes. Pay $12 a month for a Nice 'n' Clean wash, which includes scented soaps, soft foam scrub, and spot-free rinse. Upgrade to the Freaky Clean wash for $16 and get a few extras, like a rim and tire scrub. Or, for $18, get the Obsessively Clean wash, including triple foam wash, Turtle Ice Wax, and paint protector. Clean Freak also offers free self-service vacuums.