Clean a water-filter pitcher: separate the cartridge before washing
Wash the pitcher, lid and reservoir by hand as directed; never treat the replaceable filter like a regular dish.
A filter pitcher has several parts, not just an outer jug. Brita US instructs owners to remove the cartridge first, hand-wash the jug, lid and reservoir with mild detergent, then rinse thoroughly; it warns against dishwashers and abrasive cleaners. These are Brita-specific examples, not a universal procedure for every filter.