I'm having some problems turning the ignition key in the ignition switch. Two keys give same results. WD40 has no effect. Haynes manual says very little. So any experience out there will be helpful. I don't have a problem taking out & refitting the switch, but is there a faint hope that there may be an easy solution? If a new switch is required can it have the same code or will I be stuck with 2 keys from now on, or worse have to change all the locks?