Dental pencil Teeth Cleaning Remove Dirt And Yellow Smoke Teeth Brightening Whitening Oral Cleaning PenOur dental pens contain peppermint. It breaks down tooth melanin, gradually brightens teeth, reduces tooth problems, and keeps breath fresh. Its use method is very simple: First clean the mouth with warm water, then open the lid, twist the other end of the pen, brush the essence on the teeth, wait for 30 minutes to clean the mouth. Effective whitening teeth, clean tooth dirt, remove yellow teeth smoke teeth, white and brightening teeth, fresh breath.