We would like you to know that some of our clients have chosen to put the gel directly onto their teeth with a small brush or a Q-tip, etc. They were very careful not to get any gel on their gums. After “painting” the gel, they usually cover their teeth with a piece of aluminum foil or such paper. This method has some advantages such as making sure the gel really touches the teeth instead of sitting at the bottom of the trays. Or making sure there is only enough gel to whiten the teeth and not overflow to the gums.