It is from the battery charge point having an adverse affect on your skin. You need to ensure you wash your wrist and also the charging point all the time to make sure you skin is super clean underneath the watch. But a better option is to buy the charging point plug for the watch, that way it should stop the reaction to your wrist. As the title says I have a garmin fenix 5 plus that I put in charge for around 12 hours now and it is still not turning on. The only time the screen works is the low battery charging icon when the watch is plugged in. Windows 10 PC with Garmin Express installed will not recognize brand new, just opened Fenix 5 Plus Sapphire watch. *I have power cycled both the PC and the watch repeatedly. *I have installed and uninstalled Garmin Express over and over with PC reboots in between each step. *I have plugged in the watch with it powered off. NOTICE. To prevent corrosion, thoroughly clean and dry the contacts and the surrounding area before charging or connecting to a computer. Refer to the cleaning instructions in the appendix. Plug the small end of the USB cable into the charging port on your device. I have a Fenix 5 Plus, which I have owned for the past 3 years, I haven't been wearing it a whole lot due to losing the charger for it. I recently got a new charger for the watch, and am now trying to get it to charge but it wont. At first it showed the charge Icon. Yet after 30min I was unable to get the watch to turn on. Charger Compatible with Garmin Fenix 5/5S/5X, Fenix 6/6S/6X, Fenix 7/7S/7X Charger Charging Stand, Charging Dock Station Cradle Holder Accessory with 1m USB Cable for Vivoactive 3/4 Smartwatch. 2,980. 500+ bought in past month. $897 ($4.49/Count) List: $9.99. FREE delivery Sat, Dec 23 on $35 of items shipped by Amazon. You can use something like rubbing alcohol for this. If you suspect the charging port is particularly dirty, you could also use a toothbrush to get in there and scrub it clean. Once it’s clean, try and avoid creating new problems. This means a) rinsing off your watch and b) not plugging it in to charge until it’s dry. Charger port dust plug protector. Some people may be interested in this. I have tested it with Vivoactive 3, F5 and F6, and it fits well, so it will fit all other deviced with the same charger port. F6 port is deeper and it fits flat, but still no problems taking it out. It gives a good protection against dust, water and sweat. 5EZ5l.