I use RO-filtered water and for fun we safely discovered it does flash boil in the microwave.
I use it in a proper glass tea kettle though. It stay clean for months now, it used to get messy in a few days using tap water. I also think tea steeps tea better in low TDS water. From an osmotic point of view, that makes sense.
I’ve had it happen with tap water.
But I used to live in a place where the tap water had ridiculously low mineral content, so ymmv.
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I use RO-filtered water and for fun we safely discovered it does flash boil in the microwave.
I use it in a proper glass tea kettle though. It stay clean for months now, it used to get messy in a few days using tap water. I also think tea steeps tea better in low TDS water. From an osmotic point of view, that makes sense.
Normally our tap water is nearly liquid tums 😅