Ingredient caution: benzoyl peroxide might cause dryness, burning, peeling and fabric bleaching; cleansing surfactants might cause dryness, stinging or tightness if overused; humectants such as hyaluronic acid/glycerin are usually gentle but might feel sticky or tight if not sealed with moisturiser. Do a patch test before applying. First-time users should start 3–4 times a week or as tolerated, moisturise well, and avoid using it in the same routine as strong retinoids/acids. Use lukewarm water, do not scrub, and follow with moisturiser. Apply on slightly damp skin and follow with moisturiser if dryness occurs. Stop use if irritation persists.