The hard white chalky buildup in your dishwasher can be difficult to remove. There are a number of ways to clean this off. This is a guide about removing hard water stains inside the dishwasher.
If you have discoloration in your dishwasher, just pour in a cup of Tang orange juice crystals. Run the washer through a regular cycle and you'll be amazed at how hard water stains and discolorations have disappeared.
Source: Shared by a friend years ago.
By Sandy from Elon, NC
How do I remove hard-water build up on dishwasher walls, from well water?
By BEA from McAllen, TX
Snobol It's the only thing. The rust will literally run down the bowl. Pour some under the rim and watch it disappear it's amazing. The only place I know to buy it at is Family Dollar. Walmart used to sell it but doesn't seem to anymore, maybe you can find it online.