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Old 17.11.2020, 11:47
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Re: Lime problem with light plastics on dishwasher

There are lots of minerals that can leave red/brown deposits, not just iron. We get that here (Valais) not in the dishwasher, but sinks and toilets, particularly noticeable recently after we'd had groups of people in our apartments for a couple of months who clearly hadn't been cleaning frequently enough, if at all. Cleans off easily with a bit of hydrochloric acid, available in most French supermarkets, taking care to rinse well to avoid damage to rubber or metal components.

Dishwasher-wise, we have always had problems at our Alsace house, not very much elsewhere, although it's more normal cloudiness there, not red staining. Not helped by the fact of using black tableware for the last 15 years or so. I find that a very occasional run-through of said crockery with a dishwasher cleaner can help remove it, but care must be taken as they can be quite corrosive. Vinegar also helps, as previously mentioned.

But the biggest issue seems to be the salt dispensing, where the salt in the 'tank' seems to get compressed and doesn't properly soften the water. Or maybe it just doesn't dispense enough for the very hard water we have there. From time to time I'll stick a spoon down into the filler and really stir it all around, and this seems to set the machine on the right track for a while. 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.
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