Is there any minimum hour of sleep I need to have for the product to work? June 17, 2021 13:16 Updated We recommend a minimum 4-6 hours of contact with teeth. Related articles Am I allowed to eat or drink after application? Is there an interval in between treatment cycles? How much time should I wait to go through the whitening cycle again? The formula left a film on my teeth, how do I remove this? Do you need to brush your teeth before eating in the morning after using the pen? Can this product replace professional dental cleaning? Comments 0 comments Article is closed for comments.
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