Just for everyone's information, I stopped using deodorant and soap of any kind on my armpits a few years ago. It actually took weeks for my body to adjust, but eventually I noticed my pits having very little smell anymore. I didn't know anything about microbiomes in my armpits at the time. I have tested a few times washing with bar soap, and always find that the next day my pits start to smell really quickly, and it can take a while for them to recover... now I avoid soap on my pits at all costs. I used to smell so bad, and now I don't have to worry about it at all.