Eufy Door Sensor

My eufy door sensor keeps going to offline. Also it says door open when it is actually close. How do I rectify this

mine just died after 9 days… first i thought it was the “no name” battery that died… it was Sunday had to wait 1day to find an open store and get a new battery…then i understand that it was not the battery but the sensor… had to wait 12 days to get the replacement from the store…
Be careful… before it dies mine went off line too or it was giving me wrong alarms…let’s hope it will last one year at least :unamused: