My daughter spilled a Wendy's Frosty in my backseat - gross, it's time to get the car shampooed. I took out the car seats and I thought, that's never going to get out, the dirt that's been trapped by booster seats is there to stay. I drove out with a car whose interior looked like new! It was $30 for a shampoo of a sedan, which normally I would have balked at, but it was worth every penny. They did a thorough job, it took a few hours I think. This is also connected to a gas station and the station consistently has the best prices of the stations that take credit cards.