Summarize the following:
Each time you use a bulb syringe, you should clean it with cool soapy water. This will remove anything that may remain in the syringe after use. To do this, fill a small bowl with cool soapy water. Don't use warm or hot water because that will make it harder to remove the mucus from the bulb. Place the syringe so that it is fully submerged in the water. Leave the syringe in the water for a few minutes. Place the tip of the syringe in the water and squeeze the bulb so that the syringe fills with the soapy water. Aim the hole of the syringe in the direction of the water and squeeze the bulb to release the water down the drain. Continue to fill up the syringe with cool soapy water and then release the water. Do this three to four times in order to make sure that the inside of the syringe is completely cleaned.

Summary:
Fill a small bowl with cool soapy water. Soak the syringe in water. Squeeze the syringe with the tip in the soap mixture. Release the soap. Repeat three times.