Are you tired of having stained or yellow teeth? ,000shs, get yourself this teeth whitening pen and have permanent results with in 1 week of use. easy and safe to use. call/whatsapp https//... usage 1. brush and clean your teeth 2. get the whitening pen and pass on the teeth one at a time 3. do not cover your mouth for atleast 2 minutes 4. do not eat or drink anythg until after 30 minutes