Thanks for the suggestions. I've looked into the weep hole covers. We are missing one, but I don't think that is where the sound is coming from. It seems more like it is around the sides of the windshield. I think I might try the painters tape along the edge, but it could also be mirrors. I might see if those can be adjusted at all. It just seems ridiculous that they would expect you to have to yell at each other to talk in the front seats. The model is a 2016, so I don't think it is a rust issue.