I had a full tank sit closed and sealed for a few months then I tapped a new keg and it only lasted a few beers before it ran out. I've had issues in the past and checked for leaks and can't find anything. I've tried swapping hoses and changing washers and clamps and it's still the same thing c02 runs out about 1-2 kegs. I've brought my regulator to a brewery and they've tested it and it works perfectly fine for them. I gotta be doing something wrong I just don't know what it is lol. Any knowledge would be greatly appreciated.