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…
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 we haven't cleaned it recently). Recently the accumulation of what I assume to be mineral film has gotten a bit noticeable on the dishes that go in the dishwasher.