Originally Posted by 2SSONLY
...Our water is VERY hard and spotting is really tough to prevent.
You should look into getting one of the Mr. Clean AutoDry systems. http://www.mrclean.com/en_US/home.do
Our water is extremely hard also (tons of iron coming straight out of the well). I've been using the Mr. Clean AutoDry just for the water filtering ability. It works really well for me in removing the mineral deposits from the water before it hits my trucks. Replacement filters are about $7-$8 each and mine last for about 5 washes instead of the 10 uses it says on the package but it's still cheaper than going to a local car wash.