What are the dirtiest, most contaminated objects in an airport? You might immediately picture the bathrooms or door handles, but you’d be wrong. The answer is the plastic bins at security checkpoints where we all place our phones and shoes. Those bins typically carry more germs than anything else in the airport. They are hard to keep clean—and they touch the belongings of thousands of people, some of which are bound to carry viruses and bacteria. In other words, you could be picking up infections from everyone who used that bin before you. Fortunately, since 2018, a company called Steribin...

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