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In your article about housework ("Germ warfare", 14 January), you said that after washing dishes we should "rinse with plenty of water, preferably hot". Why hot? Wouldn't it save money if they were rinsed with the cold water that comes directly from the mains?

9 August 2017

In your article about housework (“Germ warfare”, 14 January), you said that after washing dishes we should “rinse with plenty of water, preferably hot”. Why hot? Wouldn’t it save money if they were rinsed with the cold water that comes directly from the mains?

Iain Sharp, Newcastle upon Tyne, UK

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