Step 1 - Always double cleanse for your night time routine!
First, use an oil-based cleanser such as a balm or oil to remove and dissolve oil-based impurities such as sebum, SPF (YES, oil based cleansers remove SPF and sun screen, not water based cleansers), make up, other debris and excess oils from the day and clean your skin.
Here are some recommendations for Acne-prone skin:
Banila Co Clean It Zero
Heimish All Clean Balm
The second water-based cleanser such as a gel or foam type cleanser will address water-based debris such as sweat, dirt and any additional makeup leftover.
All these impurities and debris are things that can clog your pores immensely if not cleansed properly, which is why K-Beauty focuses on double cleansing so much for your night time routine. While you sleep is when your skin replenishes itself and absorbs all the nourishing products you apply. The best way to do that is with a clean face!