I just got my vivosport for a week and recently while i was cleaning my vivosport with my microfibre cloth (used for lenses), i notice that the glass on the heart rate monitor (Optical Heart Rate sensor/ OHR) has a few micro scratches.
It seems like it is made with an easy to scratch glass as I have been careful to clean the OHR with water and made sure the microfibre cloth is clean. So far the heart rate is still reading correctly, so my question are:
1) Anyone also having similar issues (optical heart rate glass having micro scratches)
2) How do you usually clean the glass on OHR?