Please choose the correct ending to complete the given sentence: Health: [header] How to remove popcorn from your teeth [title] Use dental floss. [step] The american dental association recommends using dental floss at least once every day, but especially when you know there is debris stuck between your teeth. This may also include soft debris, which can include bread.

Ending1: It is recommended that you floss with your index finger or middle finger because these are the only fingers (and sometimes only) that are not covered in debris. [substeps] Rinse your mouth and gums thoroughly with a saltwater rinse. Ending2: The starch will turn into sugar and bacteria will grow. [substeps] Try to work the floss as close to the gum as possible between the teeth where the popcorn is stuck. Ending3: It is best to floss whenever you eat. [title] Empty the popcorn out of your mouth. Ending4: To see if you like the way it is applied, check this section's guide regarding how often you should eat dry popcorn. [substeps] Dry flubs (pieces of popcorn that have popped over time) contain fluoridated dissolved fluoride.

Answer format: ending1/ending2/ending3/ending4