Yes, dishwashers work better with soft water because it has fewer minerals such as calcium and magnesium that cause water hardness. Hard water leaves deposits of mineral buildup on dishes, glasses, and other kitchenware, which can be difficult to remove. Soft water also helps detergents to work more efficiently and prevents spots and streaks on dishes after washing. In addition, soft water prolongs the lifespan of a dishwasher by reducing mineral buildup in the internal components. Overall, if you have hard water, it’s recommended to invest in a water softener to improve the performance of your dishwasher.