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Tea stains
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A community for discussions related to tea.
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I've settled into giving them a good soak and then just using elbow grease with a dish sponge I don't mind discolouring.
Thanks for the tips though. Good to know if I have a truly intractable job!
I can just tell I'm about to rotate this word into my active vocabulary, until someone comments on my overusing it.
I'm honored to hear that you might adopt it, it's a common word here.