They ensure in every wash cycle for a wonderfully fresh smell in the bathroom and a nice shiny clean toilet bowls.
After prolonged use also stubborn deposits solve all by itself. At the same time also by the "dirt repellant," protected from new deposits.
It is an all around great product and a genuine innovation. By the spherical shape they are perfectly washed by rinsing water and can thus optimally release their cleaning and perfumes.
The children now flush but always the same extra again, that's not so ideal for the life of Duftspülers ;-)
