Just a friendly reminder, Change those cabin air filters!
My Soul smelled very musty when the vents were on, the car is just a year old, but sure enough, the cabin air filter was DISGUSTING!
Very easy to change, you do have to remove the glovebox, but it's just 8 screws. I can almost guarantee your filter is VERY dirty.
By the way, I found a 2 pack of cabin air filters on Ebay somewhere, shipped to my door in Canada from the USA for about $20! Its a no brainer.