This is slightly tangential to the topic, but it is along the lines of the "water in my fuel" problem. It's an inline adsorption (not absorption) desiccant. It pulls the water/humidity out of your vent line before it can get to the tank. Also good for tossing in the freezer to keep the cold plate from icing up. I haven't got any personal experience with it, but it looks like something I'm going to try.
SAIL Magazine story with video:
http://www.sailmagazine.com/pittman-inn ... ryers#ooidLetter to Nigel Caulder about it:
http://www.sailmagazine.com/boatworks/a ... t-marinadeLance Smith
Baltimore, MD
No Tartan yet, but I'm going to look at one this weekend.