Have your Interior Cabin Air Filter Checked and Replaced.
We recently got this cabin air filter in to our shop. It was 4 years old. It was very dirty. The filter part in the middle is supposed to be a pure white when new. You can see with all the debris and dirt build up, the fan was not putting out the right amount of air. If you have a cabin filter let us know. We can check and replace it. Mountain Tech can also add one to your car if you would like. Subaru recommends replacing it every year or 7500 miles.