Especially with loose leaf oolong, I find acceptable flavour in resteeping used leaves in longer increments. I started out with 4, 6, 8 because it's nice and regular but soon found myself tweaking the resteep time for better flavour.
Then I realized that the tweaks I had settled on (5, 8, 13) were part of the Fibbonacci sequence. Spooky.
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