As usual I was careful not to get my keyboard wet while cleaning this week but l left the computer turned on for a change. Since then my "nine" and "delete" keys fail to react at all when pressed. I have tried pressing all keys, including the usual supsects: language preference, Cap lock, num lock, Ctrl, Alt, ec. Still I cannot use "nine" or "delete" keys. The keys themselves don't seem to have had physical damage. Any suggestions would be gratefully received !