Water spots when using dishwasher but not when handwashing dishes?

I know we have hard water where I live. I can handwash dishes in the sink and they don't get water spots after drying. When I use my dishwasher, the water spots are real bad. Could it be something with the dishwasher or should I use a different detergent? I am currently using Finish Powerball tablets along with... show more I know we have hard water where I live. I can handwash dishes in the sink and they don't get water spots after drying. When I use my dishwasher, the water spots are real bad. Could it be something with the dishwasher or should I use a different detergent? I am currently using Finish Powerball tablets along with Finish Jet Dry. It doesn't seem to help any. What do you guys do to fight hard water?
8 answers 8