I know this thread is old but wondering if you ever found a solution? I'm a 32 year old female and I have suffered from the exact same underarm problem ever since i can remember. It seems to have gotten worse as the years have passed. I switched to Lavilin cream deodorant and it didn't seem to work and then I came across a forum saying betadine cleanser solved the problem. On Amazon the reviews say they are using it for the same reason I have. I just ordered it last night and it is coming today so I haven't tried it yet but I am seriously hoping this will work. I believe this to be the only thing left on the planet that will work.