I believe your Issue would be a leak at the Heater and not the AC Unit. The AC unit is a pressurized system of Freon Gas, (NOT LIQUID) and the Heater is filled with Coolant, (a liquid). If this is the case, it is in all likelihood your Heater Core is the Culprit and cause of your Leak. Does the "WETNESS" smell like Coolant, a sweet type of smell? (That is assuming you do have Coolant / Antifreeze in the Radiator) If THIS IS your issue, a leaking Heater Core, be advised, it is NOT A CHEAP FIX. All so quite labor intensive to replace.
You can in the meantime, bypass the Heater Core all together if the Repair can't be performed in the Immediate future. One other possibility could be the Cowl Drain could be plugged with Leaves or other Debris allowing Rain Water, or Wash Water to fill the Heater Box and overflowing into the Passenger Compartment. But if you haven't Washed your Jeep, or it hasn't been Raining, you can eliminate that as a cause.