Smokers should protect their teeth by brushing and flossing regularly, as well as visiting their dentist regularly for cleanings and check-ups. It is also important for smokers to quit smoking, as smoking can cause serious damage to the teeth and gums. Some ways to help quit smoking include using nicotine replacement therapy, such as patches or gum, or seeking support from friends, family, or a support group. Additionally, avoiding sugary and acidic foods and drinks can help protect the teeth from decay.