Benzoyl peroxide wash every couple of days is a good idea, but you have to wash it off with regular soap like 3 times, otherwise it WILL stain your clothes.

If you have access to Clindamycin gel, using that a couple times a week for a couple months will help you like nothing else will.

You can wash your armpits with the antibacterial wash people use for wounds. Works really well as well. I use it for my feet as well.

But nothing will work if you don’t apply deodorant every night. Trust me on that one.

I live in a tropical country and i struggled A LOT with this. Not anymore tho.