how long will products like Ammo last in your clothing if you were to wash them on a normal basis?
The androstenone in Ammo is really weak, 2.5mcg per spray. PLus it has 2.5mcg of androstenol and 2.5mcg o androsterone. I wouldn’t worry about it too much unless you soak yourself in it. I’ve never had problems with any sort of build-up after washing. Of course you could avoid those types of issues by applying to skin or hair. Most people only apply to clothing during winters (when little skin shows).
Wash your cloths with some oxyclean and the mones will be all gone 
Work on a loofah and hair too!