Try running a load without adding the salt and let me know if it makes a diffrence.
I'm thinking that you may have a heating coil going out and it is not melting the salt when the load runs.
I was misled by your adding salt statement. I thought you ment that you added salt to the load not the softener feature.
Another expert has suggested to me that you might try a product called "Dishwasher Magic". He is a salesman for major appliances and says that the product works well for the customers he has suggested it to.
Give this product a try. If itm does not solve your problem I will still be here to assist you further.
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Best regards; The Home Smithy
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