yet another kegging question. tried to look online, and it just seemed to focus on the regulator to keg line. anyway, i've had the keg chilled and carbed (hopefully I think enough) since the weekend. But, when i go to pull the tap, it seems to gurgle a bit coming out. almost like there's something blocking the hole partially. any idea what this is and how to fix it? also, bonus question, if i leave the one keg hooked up to the serving line, but remove the co2 to carb another keg, will that slowly leak the first keg? should i unhook everything if i'm doing that?