Medically Reviewed by Nayana Ambardekar, MD.

Smartphone: Daily

You touch your phone countless times a day, and the fingerprints you leave on the screen are a grease trap for gunk and germs. Get in the habit of wiping it clean at least once a day. Sanitize it more often if you’re exposed to COVID-19 or the flu. Studies show alcohol is best for killing bacteria, but check with your device’s manufacturer to see what it recommends to avoid damage. Clean the case, too!

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