I did think this but since I got my dishwasher about twice a year the indicators for rinse aid and salt light up and I fill them up even though I use 3 in 1 tablets. I wouldnt bother but since this issue with the salt Its not washing the dishes properly and leaving residue and food on them. When I now open the dishwasher there is a gathering of food at the bottom, this didnt use to happen. I add tablets that have both but as I said since this has happened I do see a difference.
Paula, October 2012