I agree with Jenny2014 I have whipples disease and once it has spread throughout my whole body now my Body Odor smells musty and that's the kind of bacteria that gives the dirt it's musty smell no matter what I do there's nothing you can do because once it's in all your bodily tissues the toxins come out through your pores and in your sweat and bodily fluids. Actinomyctetes bacteria is what gives the dirt/soil it's musty smell. All of my shirts that I wear no matter how many times I wash them or what detergent I use even borax the smell stays embedded in them. Maybe that's what's causing your same smell or issues. Could be a possibility. Do you find your armpits drenched all the time and notice the sweat discoloring your colored shirts at all? That's what happened to mine and also over time the armpit in my shirts get hard because of the bacteria or toxins in my sweat. I mean really hard.