Rinse aid is completely unneeded if you properly maintain and use your dishwasher. I never use any, and my dishes are completely spotless. 30 years old dishwasher, super hard water. Specifically, you should: - always fill the salt of the dishwasher's water softener once it's empty. It cannot soften the water if it doesn't get cleaned by the salt. If the water is not softened you will get spots. EDIT: Apparently US fo…
Fill the salt? I'm not sure all dishwashers have a receptacle for that. Ours doesn't, and I'm pretty confident that I've never had one that did across several states in the US and one place in Belgium. Is the salt for doing a softening process that substitutes for a whole house softener if you don't have one? We live in a place with hard water and have no softener in the house (you should see our electric kettle when…
The dishwasher is also 30 years old. Miele G 680 SC from 1992. Living in New York. Perhaps adding salt was more common in older models.