The K-pop Idol Glass Skin Routine, Step by Step

Sourced from Allure, Byrdie, iwaymagazine.com, tirabeauty.com, michelegreenmd.com, and asianbeautyessentials.com.

The double-cleanse step (1) exists to remove stage makeup and SPF fully before anything else touches the skin — an oil-based cleanser to break down makeup and sunscreen, followed by a water-based cleanser to clear residue, a sequence dermatology explainers consistently point to as the reason glass-skin routines don't read as heavy despite having six named steps. The toner step (2) is deliberately layered thin, 1-3 passes, rather than saturated once — the repeated 'layering' language across sources is about building hydration gradually rather than soaking the skin in a single application.

The glow-serum step (3) is the one place these routines actually diverge by person: sources are consistent that it's one active matched to one concern — niacinamide for tone, vitamin C for brightening, hyaluronic acid for pure hydration, or centella for calming — not a stack of all four at once. That single-active discipline is arguably the more transferable lesson from this routine than any specific product name. Steps 4 and 5 (moisturizer, SPF) are treated as non-negotiable daily steps across every source checked, with no meaningful variation reported. Step 6 is explicitly the occasional layer — weekly exfoliation and periodic sheet masking — and treating it as daily is the most common way readers overcomplicate this routine.

Step 2 (hydrating toner) is where Anua Heartleaf 77 Toner slots in for readers who want the calming-toner version of this step — its documented 77% Houttuynia cordata content is Anua's own stated formula anchor, and it's a legitimate fit for the thin-layering pattern sources describe. Readers chasing the glow-forward, milkier glass-skin read on the same step instead can use Anua's Rice 70 Glow Milky Toner as an alternate — a richer texture built around a stated 70% rice extract, better suited to dry or dehydration-driven dullness than Heartleaf 77's lighter finish. Step 3 (glow serum) is where the PDRN Collagen Glow Facial Serum Spray can substitute for a mist-format serum layer — one option within the niacinamide/vitamin C/HA/centella family this step actually calls for, not a replacement for the whole step or a claim that PDRN is required for glass skin.

The six-step structure assumes a reader without active barrier damage or a dermatologist-directed treatment plan already in place. Readers managing diagnosed conditions like rosacea, eczema, or active cystic acne should treat this as general routine architecture, not a substitute for a dermatologist-set plan — the single-active discipline in step 3 is a reasonable default, but the specific active still needs to match a diagnosed concern, not just general 'glow' goals.

Sources describing this routine generally split it by time of day rather than running all six steps twice daily in identical form. The double cleanse (step 1) is typically a full oil-then-water cleanse at night to remove makeup and sunscreen, and a lighter, water-only cleanse in the morning since there's nothing to break down yet. The toner and serum steps (2 and 3) run both morning and night, though the serum's active can differ by time of day — vitamin C is more commonly used in the morning for its antioxidant role alongside SPF, while a heavier or more targeted active is more commonly reserved for night. SPF (step 5) is obviously a daytime-only step, and exfoliation and masking (step 6) are typically done at night, when there's no SPF layer to disrupt. Reading the routine as two related but distinct sequences — rather than one repeated block — makes it easier to figure out where a specific Anua product actually belongs.

How each product got placed into a step, not just named.

Readers building this routine from scratch are better served starting with steps 1, 2, 4, and 5 — cleanse, toner, moisturizer, SPF — and living with that simpler four-step version for a few weeks before adding a targeted serum (step 3) or the occasional exfoliation and masking layer (step 6). That order matters because steps 3 and 6 are where irritation risk concentrates, and it's easier to identify what's causing a reaction when it's introduced into an already-stable four-step base rather than all six steps launched at once. Readers adjusting an existing routine rather than starting fresh should audit for step overlap first — a common mistake is running two products that both function as step 3's 'glow serum' (for example, a vitamin C serum and a separate niacinamide treatment) without realizing they're duplicating the same routine slot rather than adding a genuinely new function.

As of 2026, this six-step structure is still the most consistently reported version of the routine.