I have a 1997 Wrangler Sport, bought new. Several years ago, I noticed that the passenger's floor mat was wet. The dealer said the AC drain was stopped up and fixed it. However, in the past year, the AC housing under the passenger side dash has a tendency to stay moist when the AC is running. Yesterday, with the heater on defrost (the owner's manual says the AC compressor is on with this setting), water was dripping from somewhere under the dash. Any suggestions?