Ph in armpits

I've had suffered from perspiration in my armpits for as long as I can remember. Most deodorants gave me rashes, aluminum based antiperspirants were partially effective but for some reason my body seemed to develop an "immunity" towards them and after some months they would no longer stop perspiration, odor, and ended up staining my clothes. I eventually accepted the fact that I can't seem to stop perspiration. However, from doing some research it seems that if I can change slightly the Ph level on the armpits I could maybe stop the odor producing bacteria from developing... so... I've found vinegar to be an effective deodorant. Granted, I smell like vinegar for a couple of minutes but after that the smell goes away. Also, I avoid synthetic clothing since it seems to retain humidity (and thus become stinky). Finally, I wear lighted colored clothing and for "special occasions" like customer meetings, presentations, etc, I try to use some undearm pad that would absorb sweat... So, I'm hoping that Dr. Armpit can make some revolutionary discovery that will hopefully solve the smell problem in a more natural way!