If you are happy to carefully dismantle the existing remote control, you will find a printed circuit keypad area.
If you clean that with an alcohol wipe, or Servisol contact cleaner, you should fing that it works as good as new.
Thanks for the speedy response.. I'll take the easy option and buy one.. ta
You could still fix the old one and keep it as a spare, you would have nothing to loose. If you fancy a challenge, just make sure you don`t spill the buttons everywhere by keeping the front pointing down when you separate the two sections