Handwashing is one of the most important and simple hygiene steps to prevent the spread of infection. Using Dettol handwash everyday protects from these germs and helps keep your hands clean and refreshed. Hand Hygiene The incidence of germ transference is higher from hands to mouth thereby causing illnesses like diarrhoea, swine flu, cold & cough etc. Ensuring proper hand hygiene habits for your family can act as the first line of defence in protection from various illnesses.