Every year I go through all my reels and do a thorough cleaning along with any repairs they might need.
My faithful Penn 450ss broke a bail spring last season. Picked up a couple replacements and tore it down for service.
I've had this reel for more than 30 years I'd guess and it's still a work horse in my arsenal. Wish they made them as good today.
Working on my Pfleuger Presidents now. They don't need much. Just a cleaning and greasing.
They're wonderfully simple reels as long as you don't have to get into the anti-reverse mechanism. I took one apart once. A real pain to get back together. So, I pretty much leave them alone. Haven't had one fail yet. If one ever fails, I'd probably just buy a new reel.
2 more to go and I'll get into my Fly reel collection.
Rg