I found the spare tire under water this summer shortly after I bought it. I pulled everything out dried,cleaned and oiled. The carpet looks like it'* never been wet. Last week I noticed water dripping from under the trunk area. It looked like water was dripping out of the seam behind the spare tire and before the bumper(runs all the way across). Someone has sprayed undercoating across that seam. Not sure why or how water could get up and into the spare tire area from that spot. No sun roof and all of the carpet is dry. Any ideas?