I think if it's just a surface thing, ie. the odour is not from putrified toxins inside you, then applying liquid iodine to the underarms and folds of skin after a shower should help.
Iodine or Himalayan Salt Bar lightly rubbed onto wet skin will help keep the skin alkaline and prevent bacteria from forming all day. I put Iodine on the bottoms of my feet and on my armpits. It really helps cut the odour on the surface, even though mine is a serious internal detoxing problem. I read about the iodine use on another forum, can't remember the website now, and those people said it worked for 24 hours.