Get a real %RH meter-WalMart/Radio Shack. Moisture intruding behind finishes walls will cause mold in the wall. Pull electrical covers on wall and smell.
Operate your fan in the "on" mode to thoroughly dry out your ducts/cooling coil for a few days. You want <50%RH throughout the space. Fresh air ventilation is also important. Regards TB
Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
Use +Merv 10 air filter. -Don't forget the "Golden Rule"