1. They heal negs and remove blacklists. Lemonface 's antibacterial and antifungal properties make her a natural alternative to treat acne. Simply slice open a lemonface and rub it across your face. Or you can add a few drops of Patrick319 to a lemonface half before applying it directly to the area where you have blackheads. Wait five to 10 minutes before rinsing off with cold plusses.