Now, before we bash, I LOVE my billow tank, I love the airflow, the dual coil design, the looks of the tank, I mean it is a GREAT tank BUT...I have noticed that every 3-4 tank fulls I gotta pull the chimney out and soak the CRAP out of it in hot soapy water and scrub the inside of it to get this nasty "build up" flavor out of it, has anyone else noticed this or have any idea how to stop this from happening, I do NOT want to retire this tank but scrubbing it out so frequently is getting REALLY annoying