IBM model M has 5 keys that do not work. How can I clean those contacts in the membranes?
The keyboard is in excellent shape otherwise. Can I puncture the bottom metal shell in the locations in trouble and then inject contact cleaner? Are there some other vent holes that might be used? Could it be an electonic problem or circuit board plating in those areas? The five keys affected are :
g, h, apostophe , up arow, and the number pad zero.