Bought SUV in 2019, and loved it! Suddenly last year I noticed the floor behind the driver seat was wet. I got it dried out and sprayed it with mold and mildew killer. After the next heavy rain we had, it got wet again, and spread to the front floor. As time has gone by it has gotten much worse and now is in the spare wheel well, has shorted out the lift gate control and will probably start rusting the metal. There's NO leaking from the inside. HELP!