I took it apart with the idea of using DeoxIt D5, which is magic for cleaning tarnished button connections. But nope, don't bother. It's tricky to take apart but there are instructions on YouTube - it's not easy but with patience can be done. However, there is no access to the button contacts. It looks like a double sandwich board with the contacts between the boards and therefore inaccessible. There is a wide layer of tape on top of the button area which you probably won't want to remove anyway.
My remotes are all no more than six months old, and should not be failing, either from tarnish (unlikely in six months) or from use (in six months?). I believe it's a design issue and the button mechanisms themselves are very prematurely failing mechanicly.
Customer Service says they are sending me a new remote but without a design change, I foresee a continual loop of failure every six months. At this point, I have to press down extremely hard to get any response at all. The right arrow button which is used the most is the worst.
I think you are right, retailers will desert the brand and we'll all end up with orphan devices and a lost cash outlay.
Unless Roku fixes this properly, I'll probably vote with my feet and buy another manufacturer's devices when these totally fail.
