Once the 30 seconds are up, you can close your mouth again but make sure you do not eat or drink anything for the next 30 minutes. This enables the product to take action. Once the half hour is up, give your mouth a thorough rinse.
The GoGo Smile Teeth Whitening Pen can be used at any time of night or day, and whenever required. For more immediate effects, use in combination with the LED Teeth Whitening Accelerator Light and repeat the above process every hour.