Whatever you do also use spot-free soap....
Sommmmmmeone (STEVE) was laughing at me for washing my boat in Destin until he saw by just using the spot-free soap the boat looked grrrreat for the trip home.
P.S. On another note.... my wife wanted a water softener system for the house we just built. I was the typical male (who couldn't care less)... but, now that we have it, I will never have another home w/out one.