... because people have been out sprinkling it on the 6 inch deep ice on their driveways . All salt of any description sold out in the whole of the town, apparently. So my question is, how much does this matter? We have a private water supply so can't find out about water hardness, but the water seems pretty soft to me. Will I kill the dishwasher if I use it without until all the ice in town has thawed? (Please don't say yes!)