I just figured this out literally a few minutes ago. I bought a another brand new fire stick just for the remote because my other one stopped working. I tired new batteries, pressing down the home button for five seconds, all of that, but nothing worked. I just discovered why I think my other one stopped working. Remove the batteries from the remote. You have to clean off the two metal prongs that touch the batteries. If that has corrosion or dirt on it, I’m guessing the remote can’t get power from the batteries. Simply wipe off the two metal prongs, put brand new batteries in and Viola! My remote works again! Hopefully this will work for yours!