I've had my Fitbit Charge 2 since November and I've loved it so far. But I have problem with my resting heart rate.
Since I bought it my resting heart rate have been around 69-70 every day for five weeks but in the latest week it have shown a resting heart rate around 80. I'm a bit surprised because I've actually been out running more often recently.
Another problem I've got with the Fitbit lately (during the same period), is that it doesn't track my sleep accurate. It´s pretty accurate around wake up time but it shows wrong time when I go to bed/fall asleep. Sometimes it's as much as four or five hours wrong. As I know, I haven't changed my sleep routines or sleep quality for years now.
firstly I thought that maybe the reason could have been sweat or lotion so I've tried to carefully swipe the sensor with water but there was no difference.
