The HR sensor glass of my FR645 is cracked and I don't understand why. I literally only take off the watch to charge it... Did this happen to anyone else? : r/Garmin
How common is broken ohr - Forerunner 935 - Running/Multisport - Garmin Forums
Fenix 5 Series OHR Cracking - fēnix 5 series - Wearables - Garmin Forums
PSA: Look at the heart rate sensor of your fenix 5. Has it cracks like mine? If yes, it's a common problem. Send it to Garmin and get a free replacement. Do