Use this brush for more than 2 years and it is neither frayed nor dirty (they must, of course, from time to time in the toilet with some Reinungsmittel by the edges "brush off" so that it stays nice and clean) so there is nothing to Sudern this product. The brush has held very well despite oftmaliger use at the time and I did not even need to use my replacement toothbrush. She still sees almost like out of the box.
I live in a 2-person household and we have all the regular bowel movements.
To apply: The chair of the sticks after Abwursten to the toilet cup can brush off well with the bristles, because they are very strong and numerous. Few Bürstgänge free the chair of the shell, the goal - an apparently clean mussel - is thus reached quickly. I am always very satisfied.