Randy,
Which detail spray did you use? What kind of cloth? These make a big difference in effectiveness. But I hope you don't use Windex on the paint of your Elise! Windex contains ammonia and possibly alcohol, which strops wax and removes protection. It also makes it easier to scratch plastic surfaces and tints. Quick detailers have lubricating properties that make dust removal safer (from minute scratches), while Windex does not. Also, QD lays down a very small amount of protection when you use it....
That being said, race cars aren't kept in show-room condition, but hey, I'm a stickler for detailing.