This doesn't work for students with braces because the metal toughens the cheek cells into callouses. Students with braces should be given instructions to scrape higher and or lower than where their braces make contact with their cheeks.
Holy, now I’m freaking out. l have an experiment examination tomorrow regarding cheek cells and I wear braces. If I can’t get the results , I might fail my test. Where is the recommended spot specifically to obtain the cells??
