I have had my Watch for about half a year now and a few weeks ago all functions in the app became inactive and I was not able to control my watch any more. I tried to pair it but the device was non-discoverable. I performed factory reset today but again I have not been able to pair it to my phone. I have removed it form the saved bluetooth devices. Now my watch only shows go.withings.com and the battery. Can you please let me know how I can pair my watch and start using it?