I have noticed in my draft beer system that all of my beers have a velvety smooth characteristic to them. They all have a good head....good lacing on the glass, but they don't seem to have a lot of bubbles in the beer. They taste good, but I would like to have a little more carbonic bite in the glass. I can't simply up the volumes of CO2 as this will just make them foamy. So, I guess to simplify my beers are foamy, but not as carbonated as I would like. I am not sure where to start to fix this issue. All of my lines are brand new and I have thoroughly cleaned the shanks and faucest. Any ideas would be appreciated.