My network used to be rock solid. For the last few weeks my Wi-Fi has been slow, unstable, and dropping completely multiple times per day. Occasionally, wired connections will still work when the Wi-Fi has dropped, but not consistently. Half of the time the app doesn't let me on either, saying it can't find the network.
 

I have done everything that I can think of, switching out the main Deco, restarting the network (as well as rebooting my ISP modem), making sure that firmware is up to date. 
 

Do I need to factory reset all Deco units and start fresh?