Flip the car on it's top works better for me!
That wasn't to funny was it?
Besides getting wet and as messy I wonder what carb or brake cleaner would do? It will clean as well as evaporate. It would take a couple of cans more than likely. Fortunately my car wasn't as dirty underneath so I cleaned mine with purple power and a brush. I did it in warm weather so it wasn't to bad.
6000 posts! Woooooo hooooooo!