Good idea, I'll try that. It's been a while since I had beer in this keg so I'll give.it a go before filling it next. Thanks!Does the black disconnect have any problem going on? If so, that could be an O-ring issue. Used to happen to me a lot and I was forever swapping out O-rings after a few months. I think it might have been the disconnect that was damaging them but if an O-ring is spent, it can affect the smoothness of the disconnect going on and off. Try rubbing a bit of Vaseline around the O-ring. If that helps, then consider replacing it.