A swirl ring can last through 50 electrode / nozzle change-outs but you still need to inspect it!
(1) Check for cracks and chips as even small cracks will impact gas flow.
(2) Inspect the O-rings for tears, cuts or flat spots.
(3) Check the metering and swirl holes for blockage. If you see any grease or debris, try to carefully clear out the hole.
(4) Ensure the swirl ring is not dirty or greasy.