How does the water vapour helps in killing germs?

Water vapor does not have any direct germicidal properties and is not generally used for killing germs. In fact, high humidity levels can promote the growth of certain bacteria and fungi.

Common methods for killing germs include using disinfectants, soap, and hot water, which directly destroy or remove microorganisms. Ultraviolet (UV) radiation and high temperatures can also be effective in killing germs.