Kia Soul 2012-2013 Black Ice Fine Mesh Grille Kit "replaceing cabin air filter" Questions

cabin air filter The fan in the car, when used, has a strong smell - the car was unused for a few years and in the garage. I thought I should take a look at the cabin air filter and replace it need be

...replaced cabin filter but smell is back There is a drain tube for the condensation that builds up inside the air distribution box that might be plugged up It exits through the firewall near the ...