Hello all, this is my first real post and I'm hoping the accumulated wisdom here can help me. There's something fucky with one of my kegs, the liquid flow is miniscule and if I dial up the pressure it goes foam on me. I've pulled it apart and looked, there's no blockages or anything and I even replaced the poppet in the post in case that was it. I'm at a loss as to what is going on with it. My other 3 kegs pour normally so it's not the tap or gas supply. It's not a complicated setup so I'm completely baffled. It's a long tube with a plug at one end, how the hell can't I find a blockage in it? Any ideas?