Need help! Have 2 kegs, pin lock w/ picnic taps. Both fine until last time both full, one trickled out (1/2 normal speed?). Did quick check on all connections, nothing wrong. Both empty now and just filled one. Trickling again! Not psi related (it has gas in, appropriate out gas). I changed to both fluid connects and both same trickle (not tap related) and changed the poppits (3 prong connects) and each did same trickle. Metal down tubes not blocked. Clueless. Anyone with this issue in past?