9. WASHING YOUR FACE WITH A HARSH CLEANSER
9.使用清潔力強的潔面產品

Washing your face removes many bugs from the surface of our skin, particularly if you use cleansers containing alcohol as this kills bacteria.
洗臉會去除皮膚表面的許多細菌，若你使用含酒精的潔面產品就更加如此，因為酒精會殺死細菌。

Most cleansers also contain soap, and this reduces the amount of oil in our skin, which loosens the bacteria’s hold — so they fall off, explained Hugh Pennington, an emeritus professor of bacteriology at the University of Aberdeen.
阿伯丁大學細菌學榮譽教授休·彭寧頓解釋說，大多數潔面產品也含有肥皂，肥皂會減少皮膚上的油脂，減小細菌的附著力——所以它們會掉下來。

This cleanliness is short-lived, as the layer of bugs rebuilds itself within about 20 minutes.
這種清潔力維持時間非常短，因為細菌層在20分鐘之內就會再次形成。

The problem is that we have bacteria on our hands, and when we touch our faces, as we inevitably do, many of the bugs that have adapted to live on moist surfaces such as our face will quickly be transferred back.
問題是，我們手上有細菌，當我們觸摸臉時（我們不可避免會這樣做），很多已經適應生活在潮濕表面的細菌（比如說我們的臉）就會很快轉移過來。