water under front mats

I was cleaning the floor , when I saw some water under both front mats. It seems strange because the top of the mats werent wet, maybe a bit damp, but it didnt rain, nor did i drive through any water. Ive checked this for the past few days and still the same , but not that wet. What could this be ? I know its not the heater core because its on both sides ,driver & pass side. Even if it was the core, the top of the mats would be wet. Any ideas?

Perhaps your A/C drain tube is clogged.