mpit20007 years ago000_MUST_ the Philips NanoProtect S3 filter (or the other one) be replaced every 24 mths (mandatory)? or can I decide this myself? Thank you very much for the answer.Show in original language (German)drmaxx0077 years ago+220 Helpful answerNo - it does not have to. The counter or the message can simply be reset.Show in original language (German)Comment3 comments