Works well. You can actually see where the older plaque is on your teeth.
I bought these to help my nephew see where he’s missing when he brushes his teeth.  We tried them together.<br /><br />New plaque (which everyone will have) shows up as pink. Older plaque turns dark blue.<br /><br />I recommend for children and adults, works great to show you the spots you might be missing when you brush your teeth!
Rating: 5 stars