I find that I factory reset my Fire TV at least every 3 months when it starts to lag and when I am watching Prime content it suddenly kicks me out of what I am watching. Netflix starts to freeze frame then speed up. I notice this more when I start to sideload apps so now since I reset it last month I didn't sideload anything.
EarthLink Extreme powered by Time Warner Cable Brooklyn.
ASUS RT-N66W Router 374.43 (Merlin Build) using OpenDNS.
Toshiba 39L2300U (My Bedroom) - Amazon Fire TV, Apple TV, Sony BDPS5200, Sony PS4.
Toshiba 32RV530U (Living Room) - Amazon Fire TV, Sony PS3 Slim.
Cats are the best pets.