Once you've applied the serum, insert the LED device into your mouth and bite down on the side wings if you find it necessary. Make sure to center the ComfortFit device in your mouth such that your upper and lower teeth are covered by the device.
Once you've applied the serum, insert the LED device into your mouth and bite down on the side wings if you find it necessary. Make sure to center the ComfortFit device in your mouth such that your upper and lower teeth are covered by the device.
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