Hello and thanks for the feedback. Mouthwashes are slowly coming to Finland as well and offer an additional option for cleaning biofilm between the teeth. In Europe, Asia and America, devices are used and recommended more than in Finland, and I don't know why the use of devices has not become more common in Finland. In other words, the first mouthwash was introduced to the world in 1962, and I think the first device came to Finland in the 1970s. An English-language and I think quite relevant review-type collection article on the subject can be found at the following link: https://www.aegisdentalnetwork.com/cced/2012/04/relevance-of-the-water-flosser-50-years-of-data Deborah M. Lyle, RDH, BS, MS (2012) Relevance of the Water Flosser: 50 Years of Data. 33(), 278-282. The main point of the article is that the need for the device starts with the user, i.e. not everyone needs such a device and the device works as long as you remember to use it. The same applies to other self-care, i.e. patient satisfaction is an important part of the success of the treatment. The need for such a device is especially in connection with some diseases, e.g. People with diseases of the tooth attachment tissue (periodontitis) and diabetes, or users of certain dental appliances, or if there have been problems with the interdental spaces when using other devices used to clean the interdental spaces. In some patients, traditional interdental cleaning tools can, for example, irritate the interdental spaces or they cannot be used for some reason due to an oral operation. We hope that the use and recommendation of mouth and gum washers will increase in Finland as well. I will try to refer the article here in the near future in connection with your mouthwash device in Finnish. I can remind you if I don't remember. Pekka