1 of the 3 brush is use halfway zz. The other two are absolute nonsense. Tongue cleaner and interdental brushes, you get low in the drug store, can be use much much better and more efficiently. This set of 3 is high-priced and served its purpose not nearly as good as commercial base products from the drugstore. Hands off!
Anyone who knows how an interdental brush works and how a tongue cleaner is applied will attest to that. I do this for many years.
