A Korean chemical exfoliator uses acids such as AHA, BHA or PHA to loosen dead surface cells instead of a scrub. Here you will find toners, essences, serums, ampoules and peeling pads from Some By Mi, COSRX, Isntree, TIAM and Mediheal. Start once or twice a week in the evening, patch test first, and wear sunscreen the next morning, since exfoliated skin can be more sun sensitive.