I have a relatively new kegerator and recently changed my first CO2 tank. I have a 1/6th barrel and was getting perfect pours until my CO2 tank ran out. I refilled it and hooked the connections back up. I let everything sit for a few days. Now my entire beer is foam. I tried turning down the psi to 2 and there was no reduction in foam. Now I turned the CO2 tank completely off and I'm still getting an entire glass of foam. This doesn't make any sense to me. Did I do something completely wrong? Sorry, I'm relatively new to using a kegerator. Thank you very much for your assistance.