My carpet is wet under my floor mats. Has anyone ever had this problem? Outcome? on 2006 Lexus IS250

The carpeting started getting wet this summer. It dries if the car sits long enough but gets wet again when I drive. I also hear water sloshing (I believe near the front passenger side of the the car) when I stop or when I accelerate.

Asked by for the 2006 Lexus IS250
Have AC drain cleaned out!!