Dishwasher salt and table salt are different. While both are primarily composed of sodium chloride, they serve different purposes and have distinct properties. Dishwasher salt is specifically designed to soften water in your dishwasher, preventing limescale build-up and improving the performance of your machine. It is coarser and free from additives, such as iodine or anti-caking agents, which are often found in table salt.(1) These additives can interfere with your dishwasher's softening system, potentially causing damage. Table salt is finely ground and intended for consumption, and it often includes iodine and anti-caking agents to prevent clumping, making it unsuitable for dishwashers.
Another common question is: is dishwasher salt the same as rock salt? While both have a coarse texture, they are not interchangeable. Rock salt, typically used for de-icing or in some culinary applications,(1) can also contain impurities that can harm your dishwasher’s internal components.(2) Always use dishwasher salt, and use as directed for optimal cleaning results and to protect your appliance. Substituting it with table salt or rock salt can lead to damage and reduced efficiency in your machine.
(1)https://www.oxfordreference.com/display/10.1093/oi/authority.20110803101824485
(2)http://www.appliance-care.org.uk/dishwasher-care/daily-use/salt/
