When you first start using it, put some on every NIGHT for maybe a week unless you have sensitive skin.
If you are a chicka and shave, I would put it on on the days you DON"T shave your underarms or it may irritate.
You do not need to put it on heavy. just a light roll on the entire underarm.
After the first week, I went to maybe 2 times a week for a while
and then after a month or so the extreme sweating stopped and now I use regular Anti-Pirsp and the certain dry maybe only every few weeks to keep the glands in check ans shrunk.
This is what is does, it shrinks the sweat glands..