Well, I fixed mine, after dismantling it was clear that the underside of one button was shiny and the others not. I cleaned carefully with Isopropyl Alcohol which didn't help at all.
So I stuck on a little bit of silver tape from Wickes used for joining sheets of insulation board (had some to hand), unfortunately I can't post photos due to my low post count here.
Now I can fastforward with the best of them!
Unfortunately, despite carefully prizing it apart with non-metal tools, permanent damage was done to the remote - some of the little clips that hold it together broke tiny bits off the plastic of the shell (sadly again, can't post a photo of this). But it works, which is the main thing, and the damage is barely noticeable - mostly one end.