Thank so much for your honest review. Unfortunately, we are aware that bamboo has a tendency to go black if left wet - it's the nature of the natural product. Also, I am sorry that the paint is coming off the bottom, it sounds like you might need to store the toothbrushes in an open style clip rather than a pot which does get water round the bottom. In light of this, I'd hate for you to be left with unusable toothbrushes, would you like me to send you a replacement pack? Please do email me back and I will get this sent off to you right away.
The Wild and Stone Team