1. Use a scoopable cat litter. Scoopable cat litters make cat waste easier to scoop, so you can get most of the stinky stuff out when you scoop the box. 2. Scoop the boxes regularly. No one likes scooping the litter boxes, but as a cat owner it is a must. 3. Wash all litter boxes regularly. 4. Contain the smell after you scoop. Litter genie.