You can do it by following the 6 simple steps given below:  6 Simple Steps for Odour Control: Make sure to Scoop the waste daily. Ideally, it should be twice a day. Changing the litter twice a week or at least once a week is a must. Wash the little box twice a month or once a month minimum. Change the litter box once a year. Find a litter that deodorizes the best. Place the litter box in an open or well-ventilated area.