Dishwasher salt in an 18" American dishwasher
I have a US model of Miele dishwasher (and am in the US), and I'm on a well that has hard water. I have the 18" model, there is no spot to add dishwasher salt that I can see. I'm having issues with white gritty residue on the dishes. Should I add dishwasher salt to my rinse aid (which is the 10% citric acid recommended by the manual), or is there another way I can dispense some salt when my dishes are done?
I mention the country because dishwashers in the US typically do not take salt.