* Add these tips to our syringes to help apply the gel to your trays.

* It is important to add a thin layer of teeth whitening gel to the mouth trays. This thin layer of gel should only be added to the part of the tray which will have contact with the teeth below the gum line.

* It is especially important to be precise when adding teeth whitening gel to these types of trays: custom trays from a dental lab, night guards and clear braces, and other types of dental aligners which are tight on the teeth.