Hi, I have a Nissan NV3500. On 4 occasions the ignition key wouldn't turn. I've tried moving the steering wheel, jiggling the shifter, pushing on the brake peddle, locking, unlocking the doors, jiggling the key in and out, back and forth, using the spare key and swearing. Nothing works then all of a sudden, it will turn. It has taken up to 15 minutes to finally turn. Any ideas? It has less than 3000 miles. Thanks! Jo