I have brushed with this 7 times now since receiving ...
I have brushed with this 7 times now since receiving this last week. I can't really tell if it's working. Very messy, but I knew that before I purchased. I was using twice a day then switched to once at night. Still waiting for the white. This does leave a clean fealling once you have flossed the black out, and brushed with my sonicare afterwards.
Rating: 3 stars