Do not use alcohol or vinegar on your skin if it’s they’re not in a formulation made for skin. You’ll do damage.

You don’t need to have folliculitis or any type of infection to experience persistent odor, any bacterial build-up will cause it. The ACV is working because it’s an acid, and it does kill the bacteria, but it’s too harsh to be used like this (if you’re outdoors in a pinch, you can even use antibacterial gel for the same effect). What you can use which is safe for your skin is AHA or BHA, products which are safe to use even on your face and made for this purpose, or even simpler, antibacterial soap, but may be some trial and error to find the one that works well enough. (But always patch test before using new products of course)