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Is also a darn sight more expensive than the older method of salt +
detergent + rinse aid.

Which is probably why plain simple DW detergent is becoming hard to find
'cos all the shelf space has been given over to 17in1 tablets "Removes
even dead elephants without scraping even in hard water areas" etc.

Asda's value brand tablets seem the simplest, cheapest and most
effective at the moment.

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Skipweasel
Pay no attention to that man behind the curtain.