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Old 17.11.2020, 12:04
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Re: Lime problem with light plastics on dishwasher

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Worth a try, and perhaps you can test the theory by just manually adding a little salt into the machine in the wash and rinse cycles.
As far as I understand how the salt works in a dish washer this will not work.
The dishwasher has an ion exchanger, a water softener which works by replacing the Ca ions in the water with Na ions. This does not work by simply throwing salt in water or inside the dishwasher. The salt must go in the correct compartment.

Every so often the Na ions in the ion exchanger are depleted and it is saturated with Ca ions. The exchanger must be regenerated by flushing it with a Na ion rich solution: Salt brine. Hence, the German term "Regenieriersalz" for dishwater salt (It is just plain NaCl w/o iodine and anti caking agent).
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