I leave it in until the wort is transferred to the fermenter. I figure a 10% loss in hop utilization when you use a spider instead of tossing them in loose. IMO, leaving the spider in during chilling and transfer mitigates most of that loss.
I generally leave mine in the kettle until I start cooling. Then I lift it out of the wort but leave it hang on the side of the pot to drain until it stops dripping.
This is mostly because I don’t want to have cool a ball of hop pellets that will get tossed anyway. It saves some chilling water (at least that’s what I tell myself).
When I use mine I take it out at flameout. I let it drain a little bit and then chill. But I don’t like the muted hop character I would get with it so I stopped using it… I let the pellets swim in the wort as they were meant to do.
Thanks guys, In the beginning I used to just remove the spider at flameout but now I keep it till its finished cooling,but yesterday I started asking myself wether I should’ve kept it those extra like 3 mins as the kettle drained to fermenter. Now relaxing and having a homebrew to think about it the idea I’d lose utilization for that time is nonsensical lol