How Much MMS1 To Use For Underarms

So sometimes we go camping in the middle of nowhere and there are no washing facilities.

We wash when we get home. We exercise a lot when there doing rock climbing and so sweat a lot. My underarms have developed a little smell even though I clean them with soap and water at home.

I don't have any CDS at the moment so how many drops of MMS1 in how much water should I use to treat the area. Keep in mind that the underarm area has quite sensitive skin.

Thanks