Also I'm sorry for the questions, but as I've mentioned before we just moved into an apartment. We have this smell musty/sour in the living room in the corner of our apartment. I've sprayed febreeze, vacuumed, even cleaned the carpet but the smell's still there. We were thinking maybe it's from a leak int he firplace or something b/c it's aorund there, should we clean the fireplace maybe or is there something else we can spray? We've contacted the maintance and all they did was come and spray some stuff and it didn't work. i've got allergies and asthma bad and I can't stand to stay in the living room b/c of attack or it just smells so BAD. What could it possibly be?