If it's a short circuit due to spilled liquid you can try distilled water. If that doesn't help, you will have to do a bolt mod, separate membranes from the plates, clean up internals then put it back together. Not an easy fix and may alter the feeling of your keyboard but will give you a way to adjust the sound / feel of the springs and will make your keyboard last longer.
You can also try ordering the membranes and plate assembly without the casing and controller board from Unicomp as it will be cheaper than the whole board and may be cheaper to ship from America.