Shows where you missed
My grandchild was convinced that brushing with the electric toothbrush was creating a perfect plaqueless smile.  I told the child oooh contraire, you are missing spots; so, to prove my point we used the tablets. As always grandma was right.  What we discovered, not only were there purple and red areas but also the tablet stained the teeth brown. We are unsure what the brown staining meant, but we soon found out the brown staining took a couple of days of brushing to remove.  The product works great for identifying the missed areas but the additional staining comes at a cost of additional brushing longer and frequent.  Huuum, that might not be a bad thing.  The 4-star rating was for product inconvenience.
Rating: 4 stars