How do you fix peeling bumper stickers?

To fix peeling bumper stickers, start by carefully lifting the edges of the sticker using a plastic scraper or your fingernail. Clean the surface underneath with rubbing alcohol to remove any dirt or residue. Apply a small amount of adhesive, such as clear craft glue or spray adhesive, to the lifted edges and press down firmly. Finally, use a flat object to smooth out any air bubbles and ensure a secure bond.