no live view and blank videos

I have the ring 1 a few months now.Initially everything worked fine. THen the live view seemed very hit and miss.for the last few months the live view doesnt work at all. Sometimes the app will not respond when teh button is pushed and motion detection quite often misses things. Yesterday it started recording a black screen instead or teh video when motion is detected or the button is pushed. At this stage the doorbell does nothing that it should do. the RSSI value is 043 and the doorbell runs on battery.