Fill your cat's clean and dry litter box with 2-3 inches of litter (go up to 4inches if your pet is a big scratcher) so your cat can paw and cover as per its pleasure.
Scoop out your cat's litter at least twice a day or when you notice multiple clumps, and throw them in the dustbin. Do not flush litter down the toilet. Refill your cat's litter box post this.
Clean the litter box with water and mild soap in between filling with completely new litter.