I am having a few issues with my Cask ale having little to no head & leaving no lacing on the glass. I am assuming this is a temperature issue as the ale is slightly too cold but am unsure?? My cellar is the correct temperature but my cask ale lines run through the same python as my keg beer, could this be causing the issue?? (the cask lines do by-pass the cooler). I also use a cask breather/aspirator system, could this add to the issue?? Any suggestions would be greatly appreciated, Cheers.