CA Prop 65 - For Residents of California
Warning: Welding and cutting equipment, accessories, and fumes can expose you to chemicals, including Chromium (Hexavalent Compounds), Lead, and Nickel, which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, please visit www.P65Warnings.ca.gov.
The swirl ring is the magic demn of a plasma torch. It's near impossible to tell when they've worn out, as there is little visual indication of such, so keep a few extras on hand. If changing the tip/electrode doesn't fix a firing issue, the swirl ring is probably the culprit and the low cost to make the swap to a new one will mean that the time saved fussing with it will more than pay for the cost of the replacement.