Hello, beauties! I want to review this BHA liquid, which is my Holy Grail product! It's a gentle, leave-on exfoliant. It uses beta-hydroxy acids (which are more powerful than alpha-hydroxy acids like glycolic acid and lactic acid). And it's in a moisturizing, silicone-free gel base. There's nothing else quite like it on the market! Most BHA and salicylic acid products are spot treatments, for applying to individual pimples as they happen. COSRX BHA Blackhead Power Liquid is one of the only ones that is meant to be used ALL OVER your face. In fact, using it on a regular basis—ideally daily—as a full-face treatment is far more effective against acne because it helps prevent clogged pores from even forming in the first place! The reason COSRX BHA Blackhead Power Liquid works so well against acne is that, as a BHA, it is oil-soluble and penetrates deeply, through sebum. This is different from AHAs (alpha-hydroxy acids), which are only water-soluble and remain on the skin surface. So once