I’ve been using sonicare brushes for about 8 years now. These are nice brush heads, but they don’t seem to last as long as others I’ve had in the past. The blue indicator stuff seems to start wearing out after only a few uses. Instead of using the blue stuff as an indicator as to when to replace my brush head I just pay attention to the bristles.
The product was advertised as a package of 3 toothbrushes but I received only 2. Opened the package and then realized that it was supposed to be 3, not 2
Found it hard and easy to be in need of replacement