My manicure didn't last 15 days, what did I do wrong?Aktualisiert vor 6 Stunden

Not necessarily anything. Wear time depends on your individual nail condition, careful preparation — including a well-degreased nail — and thin, precisely sealed coats with no trapped air bubbles. Next time, pay special attention to the nail tips — that's where gel tends to lift first. You'll find the detailed step-by-step guide with video at https://www.gitticonsciousbeauty.com/pages/manicure-steps-gelcare