Well been having mildew odor recently in mine. I have had mine going on 2 yrs and only 18000 miles and never anything till recently. I checked and I have a water stain on my headliner drivers side rear. I have no cracks on rear window frame, the plugs between the bed and cab are fully pushed in. I called my dealer and they said they source that out and to stop by so they can see it quickly. How do you source this stuff out when it is a Ram issue? My build date is 3-18