Korean Double-Cleanse Routine: Anua Cleansing Oil vs COSRX Low-pH Gel vs Beauty of Joseon Green Plum (2026)

Short answer: stop thinking of these as three options and start thinking of them as three steps. Per SGC's formula check, the Anua Heartleaf cleansing oil is your PM first cleanse — it dissolves sunscreen, sebum and makeup that water can't touch. The COSRX Low-pH Good Morning Gel is the gentle second cleanse (and your whole morning cleanse), built to leave your barrier intact. The Beauty of Joseon Green Plum is the AHA/BHA "refresher" you reach for a few times a week when skin feels congested or you've sweated through the day. Oily and combination skin in hot weather usually wants all three — just not at the same moment.

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(One note up front: this is a routine comparison, not a "which one is best" shootout. If you're choosing between two low-pH gels specifically, that's a different question — see our COSRX vs BoJ vs Round Lab low-pH cleansers. This piece is about how an oil, a gel, and an exfoliating cleanser divide the work.)

The Comparison, Up Front

How a Double Cleanse Actually Works

The logic behind "double cleansing" is simple: oil dissolves oil, water dissolves water. Sunscreen, sebum and most makeup are oil-soluble, so a water-based gel alone smears them around rather than lifting them off. An oil cleanser breaks them down first; the gel then clears the residue and any water-based sweat and grime. In humid heat — where you're layering more SPF and sweating more — that two-step PM cleanse does more for congestion than scrubbing harder ever will.

The Green Plum sits outside that nightly pair. It's an occasional exfoliating cleanse, not a daily one. Using all three correctly means: oil + gel at night, gel in the morning, and the Green Plum swapped in for the gel a few nights a week.

Ingredient Deep-Dive

Anua Heartleaf Cleansing Oil — the PM first cleanse

Per SGC's formula check, this leans on lightweight plant oils to emulsify cleanly and a generous dose of Houttuynia Cordata (heartleaf) extract, the soothing botanical Anua built its brand on. The point of a good first cleanse isn't just "removal" — it's removing without leaving an occlusive film that re-clogs you. Oil cleansers that rinse to a low, non-greasy residue are the ones that suit oily skin, and this one is formulated to emulsify into a milky lather and rinse away rather than sit on the skin.

The honest read: this is the step most oily-skinned people skip because they fear oil — and it's exactly the step they need to lift the day's SPF and sebum. Massage onto dry skin, add water to emulsify, then follow with your gel. If you wear sunscreen daily (you should), this is the non-negotiable PM step.

COSRX Low-pH Good Morning Gel Cleanser — the daily gentle reset

This is one of the most-recommended starter cleansers in K-beauty for a reason: it's formulated at a skin-friendly low pH (around 5) so it cleans without disrupting your acid mantle, and it includes a low level of BHA (betaine salicylate) and tea tree oil for a mild clarifying touch. It's a gel that foams lightly and rinses to a soft, non-tight finish.

The honest read: this is the safe default — the AM cleanse and the PM second cleanse for almost any skin type, including sensitive and barrier-compromised. It won't deep-exfoliate (the BHA level is low), and it isn't meant to. Its whole value is being gentle enough to use twice a day, every day, without that stripped, squeaky feeling that drives oily skin to overproduce.

Beauty of Joseon Green Plum Refreshing Cleanser — the AHA/BHA refresher

The Green Plum cleanser pairs green plum (Prunus mume) extract with a mild AHA/BHA blend to lightly exfoliate as it cleanses. It's designed as a "refreshing" deep-clean for when skin feels dull, congested, or grimy after a hot, sweaty day — a step up in clarifying power from the COSRX gel.

The honest read: this is the occasional one. Used as your only daily cleanser, the AHA/BHA can be more than oily-but-sensitive skin wants every single day, especially alongside other actives. Slot it in a few nights a week — or on the days you've sweated heavily — as a replacement for your normal gel, then go back to the gentle COSRX the rest of the time. Always pair regular acid use with diligent daytime sunscreen.

Verdict by Use Case

There's no single winner — each owns a different moment in the routine:

🏆 The one you can't skip: Anua Heartleaf Cleansing Oil

If you wear sunscreen every day (and you should), the oil first-cleanse is the step that actually clears it. Buy Anua as your PM step one. New to building a hot-weather routine? Start with our 7-step Korean routine for hot weather.

Buy on: Stylevana | Amazon | YesStyle

🏆 The safe daily default: COSRX Low-pH Good Morning Gel

If you want one cleanser that's gentle enough for morning and night, every day, without stripping — buy COSRX. It's the cheapest of the three and the most universally safe, especially for sensitive or blemish-prone skin.

Buy on: Stylevana | Amazon | YesStyle

🏆 The oily-skin refresher: Beauty of Joseon Green Plum

If your skin runs oily and congested and you want a few-times-a-week deep clean — buy Green Plum. Keep it as the occasional swap for your gel, not a daily replacement.

Buy on: Stylevana | Amazon | YesStyle

What None of These Are Perfect At

In the spirit of honest reviews, here's what to keep in mind:

• None of these is a medical solution for acne. They are cleansers — they clean and prep skin. Persistent or painful breakouts are a conversation for a dermatologist, not a cleanser swap.
• Double cleansing isn't "scrub twice." Over-cleansing strips the barrier and makes oily skin worse. Two gentle steps at night beat one aggressive one.
• The Green Plum is not a daily-for-everyone product. Daily AHA/BHA can over-exfoliate reactive skin. Build up slowly and wear sunscreen.
• A cleanse is the start of a routine, not the whole thing. Pair these with a hydrating toner, moisturizer and daily SPF. For the daily foundation, see our Korean acne routine for humid climates.

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Shop the Edit

If you only buy one, COSRX wins on price and everyday safety — but the routine that actually clears hot-weather congestion is the Anua oil at night plus the gel, with the Green Plum as your weekly refresher.

This article contains affiliate links. SeoulGlowClub may earn a commission from purchases made through these links at no extra cost to you. We only recommend products we have researched against published ingredient information, Korean cosmetic regulations, and verified buyer reviews.

Keep Reading

• COSRX vs BoJ vs Round Lab: Korean Low-pH Cleansers Compared
• Anua vs Ma:nyo vs Skinfood: Korean Cleansing Oils Compared
• Best Korean Cleansers for Oily, Sweaty Skin

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The Everyday Pick

FAQ

Do I really need all three? No — but oily, sunscreen-wearing skin in hot weather benefits from all three roles. At minimum, pair the Anua oil (PM) with the COSRX gel. Add the Green Plum only if your skin runs congested.

Can I use the Green Plum every day? It's safer as a few-times-a-week step. Daily AHA/BHA cleansing can over-exfoliate, especially with other actives in your routine. Always wear sunscreen when using acids.

Oil cleanser on oily skin — won't it break me out? A well-formulated oil cleanser that emulsifies and rinses clean removes the sebum and SPF that clog you; it doesn't add a greasy film. The key is rinsing thoroughly and following with your gel.