This One Spot on The International Space Station Is Kept Filthy – For Science – ScienceAlert

While most of us are now more fastidious about keeping our homes and workplaces clean, on board the International Space Station, cleanliness is imperative.
Of high importance is anti-bacterial measures, since bacteria tend to build up in the constantly-recycled air inside the ISS.
Every Saturday in space is “cleaning day” where surfaces are wiped down, and the astronauts vacuum and collect trash.
But there’s one spot on board the station where cleaning is a no-no. But don’t worry, its all for science!
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