You can try for a factory reset . But make sure to take a fresh device backup in samsung cloud and restore from that backup post resetting watch. If still the issue persist, then try to visit service center or try for a new watch depending on ur urge...
Try torras magnetic ring cases. They are translucent cases with a foldable 360 degree magnetic rings.and for camera lenses use spigen lenseguards, usually comes with pack of 2. Extreamly easy to install and these 2 things will give you allround prote...