So I finally got my kegerator up and running! Trouble is, now it seems my CO2 tank is being consumed rather rapidly by my first kegged beer. I checked for leaks using soapy water, and found one and corrected by tightening the bolt. I know my keg is ok--since it was tested by Austin Homebrew before purchase. I've seen it go down by 25 psi in the past hour... is this normal? Could it be a function of temperature since my CO2 tank was at room temperature a few hours ago and is now around 40? I have my regulator set at 12psi. Any recommendations?