The manufacturers key will not turn in my 2001 Toyota Camry LE (4 cylinder), but when I tried a generic key, the key truns in the switch as normal each and every time. The current Toyota key and an old one I had both would not turn, but a new hardware store made key worked fine. My Dad thinks the old keys have worn down some and is suggesting putting graphite into the ignition. Can graphite hurt the ignition system and is there a mechanism on a Toyota key that stops it from turning if worn? The wheels on the car are straight, so that was not the issue. The key does not have a chip in it. Are there other security features on the Toyota key that would stop it from working while allowing a generic key to work? If there was a problem in the ingition switch I should think the generic key should not work, yes? Is using the backup key the answer?