Originally posted by AcuraFanatic
I remove all the wax from the car about once a year. It's good practice, it helps the new stuff sit better on the clearcoat.
Dishwashing soap and/or claybar will do this. Dishwashing soap is bad to use otherwise because it has de-greasing agents that will break down the wax on your car. But it's good if that's what you want it to do. 
I didnt know that about the clearcoating issue, but I sure know not to use dishwashing or laundry soaps on the surface of a shiny, waxed vehicle! I have had experience with that stuff eating through my paint....its toxic...