Keurig Descaling Solution is the only Keurig-approved cleaning solution for your Keurig brewer. It is fast acting, odorless and compatible with all Keurig series brewers. Descaling is a necessary and important process that removes calcium deposits, or scale, that tend to build up inside a brewer over time. Calcium deposits are non-toxic but if not attended to can eventually hinder your brewer's performance. You will also extend the life of your brewer if you clean it regularly using this coffee descaling solution.