how to remove dip nails, follow these steps: Trim the nails to your desired length. Gently file the top layer of the dip polish to remove the shine. Soak a cotton ball in acetone and place it on each nail. Wrap each nail with aluminum foil to keep the cotton ball in place. Wait for 10-15 minutes, then remove the foil and cotton. Use a cuticle pusher to gently scrape off the softened dip polish. Wash your hands and moisturise your nails.