@petethepugAdding a Cabin air filter, especially the activated charcoal version will undo the funk after you wash the evap coils off.
Imagine if you ran your home hvac for 13 years without a filter. Now imagine driving your home at 70mph on the highway for 13 years how nasty it’d be.
We’ve been programmed not to think about how the air in our vehicles is designed to be exchanged every 15-30 seconds even with the hvac off. Cabin air filters are good.
Do you have a part # for that cabin filter? Dont think that the dorman one in the retrofit kit is charcoal activated