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@Chrishallbeck People who make tea with a microwave either just heat the water or heat the water with a teabag in it. The second makes worse tea, but for both, the water doesn't get hot enough for proper tea, or it gets superheated and explodes if you touch it.
@coyoty @Chrishallbeck trial initially with a thermometer, then you get fast and repeatable results for your ideal temp every time.