You can always run a dry cotton swab over your phone's sensor if you're worried about using cleaners or other liquids, but it may also help to use some isopropyl rubbing alcohol (do not soak your swab, just dampen it) to disinfect the sensor and clean it more thoroughly. Related: Cracked Your Screen? What to Do About a Broken Phone Screen ![]() Natural oils, moisturizers, dirt, all of these things can affect your sensor's performance. And, given that your hands are prone to getting dirty, it's a given that your fingerprint sensor will get dirty too. ![]() Cotton swabs are great and affordable little tools for gently cleaning those smaller parts of your devices.
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