When temperatures get low (this morning it was 12F), I wake up in the morning to at least one, usually two flat tires. Even in the summer, I have to put air in the tires every month. I've taken the car to the dealership and various places around Cincinnati OH. No one can explain it. their is no damage to the tires, no leaks they could detect, nothing. I drive a Pure with the standard factory wheels and it only has 13,000 miles on it. Does anyone else have this problem?