I drove 300 miles before being alerted by the information display that my gas cap was not on. I had filled up on Thursday morning for a long trip on Friday. I had forgotten to put the cap back on. Apparantly later on my kid saw the flap partially open and closed it, but didn't know to check for the cap. This morning, 300 miles later, my car beeped at me to tell me to check the cap. Sure enough, it's off. I did not drive in dust or rain, it was all interstate, so is there any other damage that I may have caused?