Brushing alone will not remove all the food debris and/or plaque from your mouth and tooth surfaces. Flossing can help reach areas where brushing can not. It can take out food debris and some plaques between teeth. It is recommended that you floss before you brush so that all loose particles an be eliminated.
Wrap around 18-24 inches of floss around the middle finger while the other end to the opposite middle finger leaving about 1-2 inches for your teeth. Hold about an inch of the floss using thumbs and forefingers and gently insert floss between teeth. Glide the floss up and down hold against both sides of each tooth. Using a new and clean section of the floss, repeat steps as you move from tooth to another tooth. You may start from the upper teeth right to left and lower teeth right to left.