Place their litter tray in a quiet, easily accessible area where your new kitten won’t be disturbed, away from their bed and feeding area. Check at least twice a day, removing solids and soiled litter right away. Empty and disinfect the tray at least once a week to keep it smelling fresh.  Have more than one litter tray around the house to prevent toileting issues especially if you have more than one cat. There should be one litter tray per cat plus one extra.