Dont work! Works sometimes now no work!

troubleshooting
#1

The camera has stopped working. Delete app and re-start and connnects fine! Next it will not stream video and tells me to do over or re-boot my router which all other 19 devices are working just fine. The app has constantly stopped and the correction has been to delete and reinstall but now even that no l longer works? Perhaps these are good for a few months and now dead!