Every few weeks I’ll spot this in my tea cupboard and think, “That was rather expensive, I’d better give it a go and see if I can prepare it better this time.”
It never works. It’s always a bitter tea, no matter how carefully I watch the clock and fuss with the temperature. I tried following the instructions suggested by johnquix, two minutes @ 175 degree, and still bitter. Ugh. I really ought to swap this one away.