I do not wash my armpits with soap, but use some exfoliating mitts and water in the shower. Once a week I use a formula of 1% IBCH in 0.1% Brij 35 dispersant w/water for armpit odor control. Seems to be working to me, but then I don't know anyone well enough to ask them to sniff my armpits. Can wear undershirts for days/weeks with no apparent malodor. Kind regards, Stan Hope