I purchased a dual tap kegerator from kegerator.com. I have found with my kegerator that when I have a single keg in it (second tap not tapped into a keg) and the shutoff closed to the non-tapped portion, the CO2 tank has been bleeding down very quickly (roughly 1.5 weeks). I have checked the tubing, regulator, and tap for leaks and have found none. I was wondering if you have seen similar issues, and what the corrective actions are. Do I need to "blank off" the unused tap? Thanks.