Some dishwashers include a section for dishwasher salt. This special salt is sodium chloride in the form of large, rough granules. Its purpose is to soften hard water that may damage your machine ...

For those of you out there with hard water issues, dishwasher salt counteracts hard water. Large-grained dishwasher salt ...

Dishwasher salt and Rinse Aid combat against limescale As mentioned before, part of what makes glasses lose their lustre is minerals like calcium and magnesium that come with hard water.