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Why does Green Tea stain my mug?
I can understand how coffee stains coffee cups and mugs and such. However, Im getting brown stains on the sides of my ceramic mug. If my tea is clear(ok light green) and Im drinking it pretty quickly an not letting it sit in my mug, how is it causing stains?
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2020 R1250RS(Still have)
07 335i(gone)
97 M3(gone)
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