I've been doing a bit of research and it seems like that keeping you skin a bit acidic and eating a healthy alkalizing diet is the way to go. use acne products like lactic acid on your face and skin to keep it in the lower PH range acidic.
'As with most health-related barometers, balance is everything. Proper pH varies throughout your body for many reasons. For example, your bowels, skin and vagina should be slightly acidic–this helps keep unfriendly bacteria away.' The article says to not use things like Dettol because it can strip away the good bacteria on your skin as well as the bad. https://kriscarr.com/blog/ph-balance-alkaline-foods/