Took me only one wash with the ozone water purifier to remove mould stains from my cutting boards. So easy to use to wash dishes, and sterilise bench tops, even mopped the floor with it! Was super easy to install, just took the end of the kitchen tap off and screwed in the neojet, was easy peasy. It has a button on the top so can easily turn on and off. So pleased with this and find it so useful will be giving to friends and family for presents!!