Finally after 5 years of vaping i found out the solution to stop my acne for vaping, for me it isn't nicotine, pg, vg, flavours. The only thing that affect my acne is the wick and the coil. Oversaturated wick with ejuice gives my terrible whiteheads around the mouth and general acne and my skin looks horrible! Once i make my wick on my vapefly galaxies perfect no more acne! Wick should't fully saturate with eliquid, vapour must be very thick. Coil diameter must be atleast 3mm but better 4mm, more cotton the better. Vapour is very thick due to less saturation on cotton.It is the perfect balance between dry hit and too much eliquid on the wick! Hope this helps acne sufferers, because it has helped me.