Even after i comepletely flushed it all out and used viniger a white buildup has still formed on the inside of the tubes. I fluched the system 5 times with new batches of distiled water and some viniger each time. Argh this junk is ****ing me off. Anyone got some other ideas of what to do about it. Maybe i should use something like a fuel filter for awhile to get stuff thats still in there that somehow got missed from the cleaning.