2Earmold Air Blower is used to blow out any drops of moisture or debris that may be present in your BTE tubing or inside the earmold after cleaning or due to humidity.  Just insert the tip of the blower in either end of the tubing/mold and squeeze the bulb repeatedly to force gusts of air through the tube.  This should not be used with any In-the-Ear products, as there is no exit route for the air or debris you may dislodge.