I've had a wired apple keyboard for about 6 years, been used once or twice briefly and stored in it's original box in a dry place the rest of the time. It's pretty much brand new. I took it out the box to use the other day and the ` Z X and C keys have all stopped working. Any tips or advice on how i may be able to fix this? Ive seen things about using warm water but i'm not so sure about trying that. Ive taken the caps off and used some contact cleaner to no effect and there is no evidence of any damage or corrosion under the caps. Like I said it's pretty much new and can't see how theses keys would just stop working after next to no use.