just a small aside... Acne is caused by poor liver function...the toxins are pushed out of your pores where the demodex parasite feeds on them
if you ever look at the substance, it is waxy, therefore may be linked to improper fat digestion...this may be linked to poor/congested liver function (and improper bile flow), this could be a lack of minerals/energy required to properly digest the fat and assist the liver in getting rid of the toxins
if you treat the demodex parasite, you are only killing one of the causes, but not taking care of the primary cause, which is a poor diet/stressful environment which is causing this parasite to proliferate
a healthy being would not have this issue, interesting post from Andreas years ago: