As Chris M. stated, this place overcharges and indeed a $10 charge appeared on the credit card for a six dollar wash. Further, the automatic wash did not even remove the dust spots on the hood.
As a self-serve car wash, there are no employees on premises. Therefore, buyer beware! Anyway, I've already found a much better place, with excellent customer service, and considerably less expensive too!
Otherwise, Blast Off offers nothing more than your standard high pressure wand car wash with a "Touch Less" automatic drive thru that charges your credit card extra $$$.
My suggestion, just keep driving, there are much better options in every cardinal direction not far away.