All I did was clean off and replace the dirty drag lubricant. The drag was still perfect because it was made from cork. Nothing yet beats cork. Heat and start-up inertia are the two greatest enemies of fly reel drags. Lots of materials resist heat but don't provide low start-up throughout a broad range of settings.
Cork does both very well.
I'm talking about fairly large, stamped-out sheet cork disks, glued to a gear to which the spool is pressed against. Cork resists heat and compresses, which is why is it so smooth with less start-up inertia. Look, draw-bar systems using cork disks provide greater range and heat dissipation than hub drags. Able offers similar advice but suggests using pure Neatsfoot oil to lubricate the drag disk, not a compound which has motor oil added since that will cause the drag to chatter when wet. Able uses a blend of pure Neatsfoot oil and graphite, which can be obtained from the factory.