I have found that using plain old vinegar works wonders. I bought a used dishwasher that had a huge amount of hard water built up in it. I had no clue what to do. So I just thought, well, this can't hurt. I was so surprised at how well it worked!! I also wanted to disinfect, so I put lemon juice in with it. All you have to do is pour it in the bottom of the dishwasher, under the bottom rack. I use about a cup of vinegar and about 1/4 cup lemon juice. You don't have to use it every washing, but you will notice when you forget. This also works great on garbage disposals and other drains (bathtub, sinks, mud room sink etc.) Good luck.
If the cleaning is for the dishwasher and not the dishes I have heard of using tang. If it is for dishes I've used half borax and half washing soda using one teaspoon and it works great!! Good luck.
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