Wait 24 hours after the extraction before rinsing. This keeps you from experiencing severe pain while rinsing. Fill a cup or glass with one cup warm water. Make sure the water isn't too hot to avoid pain or accidentally burning the inside of your mouth. Add roughly ½ tsp. of table salt to the water. Stir the water gently with a spoon to mix the salt into the liquid. Pour all of the salt water into your mouth.