GROHE recommends that GROHE water systems including a filter are not left unused for a long period of time. If the GROHE filter systems are not used for a few days, the systems must be rinsed out with at least four liters of water.

If the GROHE Blue systems are not used for a period of about three weeks or longer, they must be cleaned with the GROHE Blue Xtra-Clean cleaning fluid and the filter replaced.

If you have a GROHE Blue Home Connect system, you can also activate the automatic flushing via the GROHE Ondus app so that the system is automatically flushed once within 24 hours.