Robotman, if you are setting your thermostat higher during the day when nobody is home, I would consider eliminating that. You need consistent humidity control inside your house to minimize allergen bloom. Setback strategies work against that goal. I would also consider TB's advice regarding ventilating dehumidifiers for a long term solution.
- Electricity makes refrigeration happen.
- Refrigeration makes the HVAC psychrometric process happen.
- HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.
A building is NOT beautiful unless it is also comfortable.