Empty and Replace Litter Daily

The fastest way to keep a litter box clean is to scoop out clumps and waste every day, usually once in the morning and once in the evening. Use a litter scoop — the slotted metal or plastic shovel designed to let sand fall through while catching clumps — and place soiled litter into a trash bag or disposal bin. Most clumping litters hold together when wet, so the scoop will separate waste from clean litter easily.

After scooping, add fresh litter to bring the box back to its original depth, usually 2 to 3 inches. This takes 30 seconds and keeps the box usable for your cat. If you skip this step, the box empties over a few days and your cat may stop using it.

Key Takeaways

  • Scoop the litter box once or twice daily to remove clumps and waste before they break down and smell.
  • Wash the box itself with hot water and mild dish soap every one to two weeks, or whenever you notice odor that scooping does not fix.
  • Replace all litter completely during the weekly wash, not just top it off, so bacteria and ammonia do not build up at the bottom.
  • A litter box that smells after scooping usually needs a full wash, not more litter or a larger box.

Wash the Box Weekly or When Odor Builds Up

Even with daily scooping, urine soaks into the bottom and sides of the box over time. Once a week, or sooner if you notice ammonia smell that scooping does not fix, empty the entire box into a trash bag and rinse it with hot water. Use a brush or cloth to scrub the inside, paying attention to corners and the bottom where urine pools. A small amount of mild dish soap works well — avoid bleach or harsh cleaners, which can irritate your cat's nose and paws.

Rinse thoroughly until no soap remains, then dry the box with a towel or let it air-dry for a few minutes. Once it is dry, add fresh litter to the original depth. This full wash removes the bacteria and mineral buildup that causes lingering odor even after you scoop.

Choose the Right Litter Type for Easier Cleaning

Some litters clump better than others, which affects how much work cleaning takes. Clumping clay litter is the most common choice because wet clumps separate cleanly from dry litter, letting you remove waste without throwing away half the box. Non-clumping litter absorbs urine but does not form solid clumps, so you have to replace more litter more often and wash the box more frequently.

Newer options like crystal litter and paper-based litter clump differently or not at all, and some people find them easier to clean because they produce less dust or smell. Try a small bag of a new type before switching entirely — cats have preferences, and a litter change can make them stop using the box.

Handle Odor That Persists After Cleaning

If the box still smells like ammonia after you wash it and scoop daily, the problem is usually one of three things: the box is too small, there is not enough litter, or your cat is not using it consistently. A box should be at least 1.5 times the length of your cat from nose to tail — a box that is too small fills with waste faster and holds odor longer.

Litter depth also matters. If you keep only an inch of litter in the box, urine reaches the plastic bottom quickly and soaks in. Aim for 2 to 3 inches so urine has room to be absorbed before it touches the box itself. If both of these are correct and odor still lingers, wash the box twice a week instead of once, or consider replacing it entirely — plastic absorbs odor over years and sometimes cannot be fully cleaned.

Prevent Litter Tracking and Mess Around the Box

Litter sticks to your cat's paws and gets tracked around the house. A litter mat placed in front of the box catches loose litter as your cat walks out, and you can dump it back into the box or the trash. Shake the mat over the box once or twice a week, or rinse it with water if it gets wet.

Keeping the box in a low-traffic area also helps — a corner of a bathroom or laundry room means less litter ends up in living spaces. If tracking is still heavy, some people use a litter box enclosure or top-entry box, which contain litter better but take longer to clean because you have to reach inside or remove the lid.

Replace the Box When Cleaning No Longer Works

Plastic litter boxes absorb odor and stains over time, and no amount of washing removes them completely. If your box is more than a year or two old and smells even after a thorough wash, replacement is usually faster than trying to restore it. A new box costs between $10 and $30 for a standard model, and the smell will disappear when ready.

When you replace the box, keep the old one nearby for a day or two so your cat can transition — some cats are particular about their box, and a sudden change can cause them to stop using it. Once your cat is using the new box consistently, you can remove the old one.

Frequently Asked Questions

How often should I completely change the litter?

Change all the litter once a week during your regular wash, or more often if you notice ammonia smell or if you use non-clumping litter. Daily scooping removes most waste, but bacteria and urine minerals build up at the bottom, so a full change is necessary to keep odor down.

Can I use bleach to clean the litter box?

Avoid bleach and other harsh chemicals — they irritate your cat's respiratory system and paws. Hot water and mild dish soap are effective and safe. If you want extra disinfection, a vinegar-and-water rinse (one part vinegar to three parts water) works without harsh fumes.

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

Cats sometimes avoid a box that smells like strong soap or cleaning products. Rinse the box thoroughly after washing so no soap residue remains. If the problem started after you switched litter types, try going back to the original — cats have scent preferences and may refuse a box that smells unfamiliar.

Is it normal for a litter box to smell even after scooping?

Some smell is normal, but strong ammonia odor after scooping means the box needs a full wash, not just daily scooping. If washing weekly does not control the smell, the box may be too small, the litter too shallow, or the plastic too old to clean properly.

Do I need a special cleaner for litter boxes?

No. Hot water and dish soap work well and are safer for your cat than commercial litter box cleaners. If you prefer a disinfectant, diluted vinegar is effective and leaves no chemical smell that might bother your cat.