Might want to check and make sure the a/c drain is fully open.
If it's partially restricted, it may allow the a/c to function normally, but in high humidity it won't let the condensation flow out fast enough, and the fan will blow water up into the case/ evap which can cause a similar condition.
It's like opening the freezer on a hot day, the "smoke" is nothing more then near frozen water vapor hitting hot air.
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.