I have a cobra tap that I use to haul my cornies to parties, etc.. But I've never been able to figure out how to get ALL of the liquid out of the line without tearing it apart... I usually run sanitizer through the tap, and then hook it up to an empty keg and try to clean out the excess in the line.. The CO2 blows out most of the liquid, but there is always some left.. Anyone know any neat tricks to clean these out?