If you're interested in selecting the clearest channel, there are several network analyzer apps that can be installed on the Firestick in just a few minutes. Just ask Alexa for network analyzer.

Read about routing tables and OpenDNS, and perhaps you will find what you're looking for. hth

Since you have two Fire Sticks and two gigabit routers, you could locate a router next to each Fire Stick, and hardwire them together with 2 adapters and 2 ethernet cables. That would remove the...

Could be a DHCP conflict. Give the new router a new IP, on the same subnet as the primary router, but not in the primary DHCP pool. Save & reboot. Then disable DHCP on the new router. (The primary...