Hand washing – who could get it wrong? Spoiler: just about everybody. We shed light on the topic. Is there an optimal technique? Why is it important to dry your hands, too? And how could the right hand-washing practices save millions of tonnes of CO₂ each year?

The hygiene expert Dr Stephan Poppe, microbiologist and Lead of Disinfection and Hygiene at WEPA, provides answers, facts and tips.