• Question: Why does handwash say 99.9% always instead of hundred percent?

    Asked by sarwar10 to MarkF on 18 Jun 2010 in Categories: .
    • Photo: Mark Fogg

      Mark Fogg answered on 18 Jun 2010:

      Nothing is ever 100% in science, particularly Biology, and I think it’s illegal for advertisers to claim handwash is 100% because of this. Also companies are covering their backs legally, just in case someone gets sick after using the hand wash/gel. It’s all marketing rubbish. 😉

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