Scoop out droppings and clumps daily and fill up the litter box as it empties. Approximately once a month, empty the litter box completely and fill it with fresh litter for maximum hygiene. CATSBI ORGANIC is 100% organic, compostable and biodegradable, and therefore can be disposed with organic trash. Single clumps can also be eliminated through the WC, because they immediately disolve when in contact with water. Please, make sure to follow local waste disposal rules.