... every year, every other year ? Not until you notice things that tell you it should be done ? Ours is 20+ years old, works great. We use ours in southern climates, maybe 4 months a year. The rebuild kits are $50-$60 bucks, it takes an hour or so, not a big deal, I usually do it every couple years. But I'm thinking annual is probably better. The Joker should be done every year I would think, but by the time you buy one of those and replace it, you might as well do the whole thing. Interested to hear how often others do theirs ?

thanks, cheers, john