Today I've bought a new tooth brush. Supposingly, it's one of the best brands in the market . According to the manufacturer, their is an indicator on some of the bristles that would change its colour to a certain mark by the third month. What's really strange, after my first use the indicator nearly reached the mark.
This leaves me with one of 2 options: 1) They are theives or 2) I have a problem with my oral hygiene habits