My latest brew is ready for drinking. Unfortunately, the PB dispenses more gas than beer. It is a top-tap King Keg. I vented the pressure and took the float assembly out; I found the hose had taken a 'set' where it is pushed onto the barbs of the float and the fitting that goes into the tap. I cut these stretched bits of the hose off and tried again. No change. So I took the fitting out of the tap and found the "O"-ring was loose. It was letting gas out as soon as I opened the tap. Do you think my food-grade grease had knackered the "O"-ring? It seemed to be too big and too thin to make a seal. It's 'silicone grease with PTFE' from Ballihoo HBS.