How often should I scoop and clean the litter box?

Scoop at least once a day, twice is better, since cats are clean animals and a soiled box is a leading reason they start going elsewhere. Do a full change of clumping litter and a wash of the box every couple of weeks, or more often with multiple cats, using plain soap and water rather than strong-smelling cleaners that can put her off. Top up litter to keep a consistent depth. A box that’s kept clean is one of the simplest ways to prevent litter box problems before they start.