Hello Kellyboy1
Gary is right that the denatured alcohol is sufficient to attempt to restore the PNR-printed circuit contacts and the relevant keys that are replicable by the 280 index on page 6 of the Service Manual.
If this intervention is insufficient, you will have to change the 6 keys "PANEL SWITCH ASSEMBLY X6" whose reference is Part.No: WJ204700
See page 100 of the Service Manual for details of reference 280.
There must be accredited centers at least in England.
Good luck.