We advise a gentle rub with a scouring pad until the original color of the ceramic filter returns. You may use luke warm water in combination with the rub. Heavy rubbing or over abrasive material may remove more of the ceramic material than is necessary. Rubber gloves are recommended to be used during cleaning and don’t use soap or detergents. Ensure that the end of the plastic mount does not come into contact with unfiltered water.
There is no need to sterilise the ceramic filter after cleaning. All Doulton and British Berkefeld filters feature technology that guards against bacteria eliminating the need for boiling either the filter or your drinking water even when used over an extended period.