How do you get rid something that is stuck on your tooth?

See a dentist: The best and safest way to clean your teeth is by visiting a professional (dentist/hygienist).

Try brushing: If it is sticky food debris it should come off with brushing. I have had patietns mistakenly think that an area of discoloration is food when in fact it was an area of decay. If it doesn't come off when you brush vigorously then have the area checked by your dentist.