Wash the litter box and reusable liner with mild dish soap and warm water. Scooping daily will keep odor in check and aid in keeping your cat healthy. Periodically add new litter to maintain the recommended 3-4 inch level. This will enable your cats to bury their mess properly while keeping urine from reaching the liner or the bottom of the litter box. Fully replace litter every 5-7 days.
To remove stubborn odors, use the Modkat Cleaner + Odor Remover.