My car has developed a trunk leak. I found that the spare tire hadn't been properly put back so I corrected that problem. I don't see the trunk seal has any problems. I put a bag of charcoal in to help with the moisture. There was something that dropped in in from the trunk. It's blue, patent number on it, and a white center. Could this be the problem? If so, where do I look to put it back? Any help would be much appreciated.