Since it disconnects every day it means that it also connects every day. How do you connect it if the application can't find it?
Have you connected the watch to multiple phones and tables? Disconnect the watch from all phones and tables. Make sure you also remove it as a bluetooth device if you see it there.
Set the watch in pairing mode and connect it to one and only one phone by opening Garmin Connect. Do not connect it as a bluetooth device. Let the Connect app handle that.
