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Letter: I washed clothes in urine and they came out great

Published 21 May 2025

From Christopher Jessop, Marloes, Pembrokeshire, UK

Never overlook human urine’s wonderful surfactant properties – the Romans certainly didn’t when it came to doing their laundry. From my experiments, any textiles steeped at ambient temperature in a solution of fresh urine and rainwater (which is naturally soft) are cleaned amazingly well. After a cold rinse cycle, I couldn’t detect any residual odour when pegging the clothes out(29 March, p 22).

Throw a handful of fresh lemon balm stems into your steeping bucket – and can anyone guess how the washing gets scented? As for disposing of the used solution: straight on the garden, of course. Its property as a wetting agent might deter, if not kill, aphids.

Issue no. 3544 published 24 May 2025

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