The red hot closeup tooth paste is too rough for the enamal of the teeth and the inner lining of the mouth. Seriously I have some allergies after using it for too long . I use too product twice a day and at starting it was cool and nice but few months later I start to have burning sensation .
I think the burning sensation is caused by some concentrated composition in the toothpaste , I suggest that it shouldnt be used by the kids as it may cause trouble for them.
The toothpaste is a bad choice to remove cigarette stains . Comparing to other brands I have used , the closeup doesnt have the quality to remove the stains caused by smoking.