Why does coffee taint thermoses so bad?

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When around thermoses not used for coffee it is usually very clearly written on them by the user that it is not to be used for coffee. Ever. Coffee thermoses on the other hand have quite the smell to them even after washing. Why does coffee taint thermoses so bad and why are dish washing products not effective enough to remove all coffee traces?

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6 Answers

Anonymous 0 Comments

Use denture cleaning tablets to remove the coffee’s miasma. I used to separate thermos for coffee and tea, but the denture cleaning tablets will remove the stains and the smells with no scrubbing or other intervention

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