We've been using Lemi Shine for about two years. We bought nice glasses and dinnerware before retiring only to find that the water in our new location was filled with lime and left a coating on our glasses.
We use it about twice a month with the regular dishwasher detergent, Lemi Shine, and the rinse aid. No more dull glasses.
And if you haven't tried Invisible Glass on your windows...oh wow! It's at WalMart and this is a good time of year to try it out. Not trying to hijack the thread.