try putting keyboards in warm dry place (no jokes please) l used hot water cuboard
and 1 my amiga 2000 keybaors seems to be cured before none keys worked , well maybe was thw 2000 l tyred it on works on my 1200 know apart for 2 keys l whould try taking it apart but dont risk not being able to put back toghter so leave well enough alone better have 2 keys not working than all of them hehe