I recently moved a brew to a keg for secondary ferment with 80g dextrose. There doesn't seem to be any carbonation (quality control after a week, I know its early but I only took an inch) I thought I might have a leaky keg as air seemed to enter via the tap, so I thought I'd pop a cylnder of co2 in and sure enough I could hear it "escaping" for a few minutes after but unfortunately could not trace the leak, the cap seems fine. What do you think I should do, move it to bottles and reprime those or just let it be. The brew tastes fine, just flat.