If any Castille owners, JTP or others that are familiar with the cleaning of the heat exchange tubes can give me some input on the cleaning of the Exchange Tubes that would be great. I do my regular pulling of the Heat Exchange Tubes cleaning....also when I pull the cover off once or week or so I wipe down the bottom of the heat exchange tubes the best I can. My question is....how do I easily get to the "top" of the heat exchange tubes to clean them up? Thanks...