i liv ein a home with radiate heat flooring, whether that is relevant or not, I'm not sure, but there are stains or spots on my carpet that are appearing on the floor. I didn't spill anything but I was wondering if there could be mold or possible the floor is sweating or something which is creating the spots. Does anyone else have any ideas, thoughts, or experience with this sort of thing. Do you think that the concrete floor has a crack in it and maybe the water pipes are sweating through the cracks. I really don't know what might causing it but I'd like to get it corrected so I can replace the flooring.