I think the microbiome on the skin and face is a large factor. Controlling it is not as straightforward as a 'quick-fix', as it literally has a life of its own

I think the microbiome on the skin and face is a large factor. Controlling it is not as straightforward as a 'quick-fix', as it literally has a life of its own. For me, the fix was wiping my face only with cotton face-wipes and water, and avoiding soap. (To be clear, I use soap everywhere else, but just use face-wipes on my face). I actually came across this quite accidentally whilst camping. At the time, I thought it strange that an apparent lack of skin amenities made my skin better. My theory is that disruption to the microbiome is a large factor, caused by detergents affecting the skin, and diet affecting the gut (which we know connects to other systems and microbiomes).