How soon after Fringe do you watch your recordings back?

I’ve got a pile of recordings and I’m deliberately not opening them yet because I can still remember every tiny thing I wanted to change. But leave it too long and I’ll forget what the room actually felt like. If you’ve been developing a longer show, when do you start reviewing footage properly — straight away while the notes are fresh, or after enough distance that you can watch the show instead of reliving the set? And do you watch whole runs first, or go hunting for the sections you already know were unstable?