The trick is to do the sinus irrigation with high Sea Salt content and Grapefruit-Seed-Extract under pressure. I am pretty sure doing this daily is solving all my bo issues. This method has cleared any odor from my face, scalp, underarms, and everything!! I am so excited about this! I hope it helps someone searching for answers. I always wondered why I got no comments after spending a day swimming in the ocean....answer is I was giving myself sinus irrigation! YES!