TI Programmer - Red LED - Key bounce

[Marcel Samek]

I have a Red LED version of the TI Programmer which basically looks new and untouched. It has been sitting in a drawer for years because it has such horrific key bounce issues that it is virtually unusable. Depressing a number key, for example, you will usually get anywhere from 2 to 4 of that number in the display.

I know TIs have issues with key bounce but this particular calculator takes it to the extreme which makes me think that there might actually be something wrong that could be fixed.

I have not tried to take it apart. Is there anything that can be done to improve the situation or is it a lost cause?