My galaxy heart sensor got moisture in it's one of it's parts and I even don't put in any water now it's heartrate sensor giving me error to clean the sensor :
Monitor Real-time Heart Rate On Watch Face Samsung Galaxy Watch 4 & 5 | Wear OS ❤ - YouTube
Samsung Galaxy Watch5 Pro 45mm BT Black Titanium, Heart Monitor, Workout Tracking, Advanced Sleep Coaching, Body Composition Analyzer : Amazon.ca: Clothing, Shoes & Accessories
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Watch Mm S EKG-monitor Tracker Zdravlje, Fitness, Jogging, Spavanja Ova Kategorija. Pametni Sat
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Samsung Galaxy Watch not recording heart rate? Tips to fix it - MyHealthyApple