Looked down at the passenger side floorboard and noticed some liquid in the floor mat. Felt the carpet and it was wet, pulled it up and noticed the floorboard and the insulation was wet also. I've already had these symptoms, thought it was the heater core but took that all apart and to my surprise the heater core was brand new. So I am kinda stumped. I don't think my windshield is leaking, but that could be a possibiliy. I have been running the a/c recently since it has been getting hotter out. Is there any possible way the a/c could be making condensation inside the vehicle?? I've seen that before, my old truck formed condenstion on some of the duct work down by the passenger side where I see the moisture now, but that much to wet the floorboard and the carpet?? Does anybody have any clue as to what this might be?? Ohh I also wiped the moisture up with a paper towel and no green residue was left and it doens't smell sweet or feel sticky? HELP!!!!!!