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Articles on Cleaning

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How many times a day do you use soap? Paul Linse/The Image Bank via Getty Images

The dirty history of soap

With hand-washing top of mind, soap is an integral part of keeping clean. But people through the ages relied on earlier forms of soap more for cleaning objects than for personal hygiene.
Sunlight, ventilation and relative humidity all affect the microbiome of indoor spaces. iStock / Getty Images Plus

Buildings have their own microbiomes – we’re striving to make them healthy places

We spend 90% of our lives indoors, and every building has its own indoor microbiome. Can we learn to manage them in ways that support helpful microbes and suppress harmful ones?

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