When breaking in a falcon bowl remove the stain from the inside and from the bottom dome. Use pure alcohol. Takes a few goes till it's all gone . But breakin is quick and pleasant after that. I believe the bowls are dipped stained.
Reactions to toothpaste and mouthwash do happen. They are rare but I was quite a few in my practice. But commoner is a new toothbrush making gums very sore(strangely!) I'm a retired dentist.
Frankly I'm beginning to lose the will to live reading this thread! If you enjoy cheap wine, tobacco , whisky, women(?) Good luck to you. Sadly I don't . This makes my hobby expensive. Some of this is better than a Monty python sketch