Have you tried this? Take your tank off the battery. Hold a tissue very loosely (so air can easily pass through) near the end of the tank where it normally connects to the battery. Then, very gently but firmly blow through the mouth piece. The excess liquid should go onto the tissue. Do this several times until no more liquid comes out. Also, thoroughly clean out the well in the connection part of the battery before putting tank back on. That should solve the issue -- I hope.