Just tapped my first keg a few weeks ago. I've probably poured around 15-20 pints from it without any trouble. A few days ago I noticed that the beer was dispensing rather slow and realized that the refrigerator was set too high and the beer had frozen. I turned the temp down and have confirmed that the beer is once again liquid but I still can't get it to dispense. I rinsed out the hose and faucet and am still not having any luck. Any ideas on what the problem is?