michael.nguyen4 years ago000Is there a cleaning agent for the filter for this product? If not, what should be used instead? Thanks in advance for the answer. :)Show in original language (German)winkitin4 years ago000I rinse the filter weekly with warm water and occasionally put it in a bath of diluted household vinegar for an hour.Show in original language (German)CommentAnonymous4 years ago000The instructions say to clean the filter once a week with citric acid.Show in original language (German)Commentbreimman4 years ago000I wash the interior with light soap once a week while the filter is in the water bath for 1 hour. After the winter season, the filter is replaced.Show in original language (German)Comment