windshield fogging because of A/C

I had my Fusion for six years now and I've maintained everything on this car. I have to with a family. Last year during humid weather, I noticed fog accumulating on the dashboard as a result of using the air conditioning, even during hot days. It gets so bad that you have to use the wipers more often, even if its not raining. Everyone wonders why my car does this. The occupants I ride with often complain they cant feel the A/C throughout the car. Its like the A/C works on the outside instead of inside. Its a real pain because you can't see well to drive. Its no use to go to our Ford dealer here because if its not new, they're not interested in your problems, even if its a Ford product! I had to gerrymander some makeshift deflectors to cover my vents so I could at least see to drive. I guess I might as well open my own company and fix Ford vehicles. I'd definitely be a billionaire.