I have three fire sticks in the house. One has just become totally unresponsive to its remote, so it it stuck on the home page. I do not know if the fault is with the remote or the stick itself. Changing batteries in the remote did not help. It looks to me like each remote conrtols only the stick it came with, so I cannot use another one. Is there a way to force one of the remotes to work with more than one stick, to see if it comes back to life? Alternativerly, is there an app for iOS that could emulate the fire stick remote?