Wash your litter box weekly with hot water and mild dish soap, then dry it completely before refilling

A clean litter box keeps your cat healthy and your home odor-free. The basic routine is straightforward: empty clumps daily, do a full wash once a week, and replace litter as needed. A weekly wash means draining the old litter, scrubbing the box with soap and water, rinsing thoroughly, drying it, and adding fresh litter. Most cat owners find this takes about 10 to 15 minutes.

The reason for weekly washing is that urine soaks into plastic over time, and soap and water alone won't remove the smell once it sets in. A thorough wash removes the buildup that causes odor and bacteria growth. If you skip this step, your cat may start using other spots in your home instead.

Key Takeaways

  • Empty clumps of soiled litter daily, and do a full wash with hot water and dish soap once a week.
  • Scrub the sides and bottom of the box thoroughly, because urine soaks into plastic and creates odor that daily scooping does not remove.
  • Rinse the box completely after washing to remove all soap residue, which can irritate your cat's paws.
  • Dry the box fully before adding fresh litter, or wet litter will clump when ready and smell worse.
  • Replace the entire litter box every one to two years, because scratches and wear make it harder to clean effectively.

Daily scooping keeps odor down between washes

Scooping clumps out daily is the fastest way to control smell and keep your cat using the box. Use a slotted scoop to remove wet clumps and solid waste, and drop them into a trash bag or disposal bin. This takes two to three minutes and removes the material that breaks down into ammonia as it sits.

If you skip daily scooping, ammonia builds up in the box and spreads through your home. Your cat will also be more likely to avoid the box if it feels dirty. Some owners use a covered box to hide odor, but this traps ammonia inside and makes the problem worse—ventilation matters more than hiding the box.

The step-by-step washing process

Start by dumping all remaining litter into a trash bag. If you use clay litter, this is straightforward. If you use pine, paper, or crystal litter, check the package to see if it can go in your regular trash or needs to go in yard waste.

Rinse the empty box with hot water to loosen stuck-on litter and urine. Then add a few squirts of mild dish soap—the kind you use for dishes, not laundry detergent—and scrub the sides and bottom with a brush or sponge. Pay special attention to corners and seams, where urine pools and dries. Scrub for at least one to two minutes.

Rinse the box thoroughly under running hot water until all soap is gone. Soap residue left on the box can irritate your cat's paws and make them avoid the litter box. If your box has a removable liner, wash that separately and let it air dry.

Dry the box completely with a clean towel or let it air dry for a few minutes. Wet litter clumps when ready and smells worse than dry litter, so this step matters. Once dry, add fresh litter to the depth recommended on the bag—usually two to three inches.

Choosing the right cleaning supplies

Use only mild dish soap and hot water. Avoid bleach, ammonia-based cleaners, and strong disinfectants, because the smell can deter your cat from using the box. Cats have sensitive noses, and a box that smells like harsh chemicals is as unappealing as a dirty one.

For scrubbing, a soft-bristled brush or an old sponge works well. Avoid steel wool or abrasive scrubbers, because they scratch the plastic and create tiny grooves where bacteria and urine hide. Once the box is scratched, it becomes harder to clean no matter how much you scrub.

If your box has stubborn stains or odor that soap and water do not remove, soak it in hot water with a small amount of white vinegar for 15 to 20 minutes before scrubbing. Vinegar is safe for cats and cuts through mineral deposits and old urine stains.

When to replace the litter box entirely

Even with regular washing, plastic litter boxes wear out. After one to two years of daily use, the plastic becomes scratched and porous, making it impossible to clean thoroughly. Once this happens, bacteria and odor live in the scratches no matter how hard you scrub.

Signs it is time to replace the box include persistent odor even after washing, visible cracks or damage, or discoloration that does not come clean. Some owners prefer to replace their boxes annually to avoid this problem altogether. A new box costs between $10 and $30 for a standard model.

When you buy a replacement, choose a box that is at least 1.5 times the length of your cat from nose to tail. A box that is too small forces your cat to use the edges, and litter spills onto your floor. If you have multiple cats, the rule is one box per cat, plus one extra.

Litter box location and ventilation

Where you place the box affects how quickly odor builds up. Put it in a well-ventilated area away from your cat's food and water bowls. Cats naturally avoid using the bathroom near where they eat, so placing the box near their food dish can cause them to eliminate elsewhere in your home.

Avoid placing the box in a closed closet or corner with no air flow. Stagnant air traps ammonia and makes odor worse. An open area or a room with a window or fan helps odor disperse and keeps the box fresher between washes.

If odor is still a problem after you have started washing weekly, the issue may be the litter itself rather than the box. Some litters absorb moisture better than others. Clumping clay litter works well for most cats, but if your cat has sensitive paws or you prefer a different material, try a few brands to find what works best.

Frequently Asked Questions

Can I use bleach to clean the litter box?

No. Bleach and ammonia-based cleaners create toxic fumes and the strong smell deters cats from using the box. Stick to mild dish soap and hot water. If you need extra cleaning power, white vinegar is safe and cuts through stubborn stains.

How often should I completely change the litter?

Change all the litter once a week during your full wash. If you use a clumping litter, you can top it off between washes by adding fresh litter to replace what you scooped out. Non-clumping litters need to be changed more often, usually every two to three days.

What if my cat stops using the litter box after I wash it?

This usually means soap residue is left on the box. Rinse it very thoroughly under running water for at least 30 seconds. If the problem continues, try washing with only hot water and no soap for a few washes, then reintroduce mild soap gradually.

Is it okay to use a litter box liner?

Liners can make cleanup easier, but many cats dislike the plastic feel under their paws and will avoid the box. If you use one, choose a thin, flexible liner and watch whether your cat still uses the box normally. If they stop, remove the liner.

How do I reduce litter tracking on my floors?

Place a mat under and in front of the box to catch litter that sticks to your cat's paws. A mat with a grid pattern works better than a flat mat because litter falls through the holes. Regular vacuuming around the box also helps, and keeping the litter box clean reduces the amount of dust and tracking overall.