Once the nail is completely dry, gently file or buff away any dried glue from the underside of the press-on. A small hand file works, but a low-speed nail drill/e-file can also be used carefully if you’re comfortable with one.
Work slowly and remove only the leftover adhesive, don’t thin out or damage the press-on itself.
Avoid soaking the press-on in acetone, since acetone can damage the nail, artwork, or finish and make the set less reusable.
Once the underside is smooth and clean, wipe away any dust and store the set until you’re ready to wear it again.
Tip: A little leftover glue is okay. You don’t need to grind the underside perfectly bare every single time, just remove enough buildup so the nail can sit properly when reapplied.