Mine is also getting the drivers side only carpet wet. However I found mine coming in around the vent window at the bottom forward of the hinge. The way I found it was the water left a clean streak where it was running in and down the door. The truck set most of the summer outdoors and dust had collected on the sill beneath the window. Since I never open this window, I'm going to seal it with a small amount of clear RTV between the glass and seal. Unless someone trys to open it, it will never be seen.