<b>Instructions:</b><br><br> 1. Shake the whitening pen for 5 seconds.<br> 2. Before treatment, apply petroleum jelly to the inside of the lips and gums (optional)<br> 3. Rotate clockwise several times until the tooth whitening gel covers the brush head.<br> 4. Gently apply a thin layer of tooth whitening gel on the tooth, avoiding gums and lips.<br> 5. Make sure to cover all surfaces of the teeth and their gaps.<br> 6. Keep smiling for 1 minute to dry the teeth whitening gel on the teeth.<br> 7. Rinse mouth after a half hour.<br> 8. Don’t eat or drink within 1 hour.<br> 9. Repeat as needed, 1-2 times a day.<br><br><br> <b>Contraindications:</b><br><br> * Pregnant women, lying-in women, and people suffering from certain diseases such as asthma and heart disease.<br> * For those who have installed porcelain dental veneers or dentures, the whitening agent cannot be applied to artificial materials.<br> * For patients with severe periodontal disease, the tooth's exposed root can’t be whitened, which will cause color differences.<br> * Adolescents under 15 and people with hypoplasia of enamel.<br> * There are cavities, wedge-shaped defects, and other problems, which need to be filled before whitening.<br> * People with gingivitis and other oral diseases should be treated first, and then can be treated for sensitive teeth whitening .<br><br><br> <b>Tips:</b><br><br> ** You can brush your teeth with toothpaste before or after using Greephil tooth whitener.<br> ** Take care of your teeth normally. Depending on the teeth whitening products you use, the whitening teeth effect can last for about 1 year, it is not permanent. The length of maintenance depends on how it is maintained so reduce the frequency of eating dark foods. If necessary, you can use the bright white teeth whitening pen in the future to prolong the effect.<br> ** If you are pursuing pearl white, you may need a series of treatments. The teeth whitening color may not be too white.<br>