Whitening Gel Refill
1. Twist bottom of pen clockwise until a little gel flows to the bristles.(For your first session, you may need to twist a few times).
2. Smile wide, keeping lips away from your teeth.
3. Use even brush strokes to apply a thin layer of gel to each tooth.
4. Insert beaut. mouthguard & turn on light.
5. After your 15 minute whitening session, rinse with water.
44% carbamide peroxide