So I am new to kegging and am working with two borrowed cornys. I have lost a 3rd 20 lb tank now and am totally frustrated. Here is where I am at. I have regastketed both and pressure tested both and used keg lube. I have force carbonated 2 different beers, and they serve fine but only have gas for about 1 1/2 - 2 weeks after dialing down to serving pressure. I was using the wrong gas line qd on the liquid post and was getting very minor amounts of liquid around the post from the qd. I was too ignorant to think anything of it. I have a set screw style clamp on the gas line hose attachment to the regulator(wonder if that matters)? Is it possible that I have a gas leak coming from my liquid post/qd location? I would think a leak from there would be all liquid. Next I feel like getting a brand new regulator as mine is old and after 3 tanks of gas I have lost confidence. Any advice would help.