Is it common knowledge that leaving a tea bag in a cup can cause staining?

Did we also know that if we leave that cup to dry out it becomes tough to remove without soaking or bleach?

I'm not trying to be patronising this is an actual question.

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CrazyMusicLover · 31-35

If you regularly drink tea, you should know that.
You also shouldn't leave a wet tag on your counter because it might get a tattoo. 😅

Mellowgirl · 31-35, F

@CrazyMusicLover it's been up for discussion at work and at home. And I've gone as far as allowing a tea bag to sit and stain a cup at home...