How best remove the blue coloration in mouth and on teeth?

How best remove the blue coloration in mouth and on teeth?

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    • Which brand of Methylene Blue should I purchase?

      Background We receive product photos from members asking if the brand is reliable/safe. Unfortunately, there has been a rise in dubious MB brands of late - so we have tried to prepare a checklist to assist. It is not comprehensive, but it's a guide. When