Correct... the article does not explicitly mention the 20-second recommendation, which was presumably arrived at by experimentation. But it does explain why su

Correct... the article does not explicitly mention the 20-second recommendation, which was presumably arrived at by experimentation. But it does explain why such a time-based recommendation might work: > The skin is quite rough and wrinkly which is why you do need a fair amount of rubbing and soaking to ensure the soap reaches very crook and nanny on the skin surface that could be hiding active viruses.