The Basic Steps for Changing a Litter Box

Changing a litter box means removing the old litter, cleaning the box, and adding fresh litter. The whole process takes about 10 to 15 minutes. You'll need a litter scoop, a trash bag, and fresh litter—that's it. Most cat owners do a full change once a week, though you may need to do it more often if you have multiple cats or a smaller box.

Start by scooping out clumps and waste daily to keep the box fresh between full changes. When you're ready for a complete change, gather your supplies in one spot so you don't have to leave the box unattended mid-way through. A cat will use a dirty box if it's the only option, but a clean one means fewer accidents outside the box and a healthier cat.

Key Takeaways

  • Scoop waste daily and do a full litter change once a week, or more often if you have multiple cats.
  • Always wear gloves and work in a well-ventilated area to avoid breathing dust and bacteria from old litter.
  • Rinse the box with hot water between changes to remove odor-causing bacteria, but skip harsh chemicals that can irritate your cat's paws.
  • Add 2 to 3 inches of fresh litter to the clean box—too little makes it hard for cats to bury waste, and too much wastes litter.
  • If your cat stops using the box after a change, it may be the new litter brand or scent; switch back to what worked before.

What You Need Before You Start

Gather these items before you begin: a litter scoop (metal or plastic with a handle), a trash bag or small waste bin, fresh litter in the same type your cat is used to, and disposable gloves. Keep a damp cloth or paper towels nearby in case you spill. If your box has a lid or filter, check that those parts are clean too.

Work in a space with good air flow—a bathroom with the door open, a laundry room, or outside if weather allows. Litter dust can irritate your lungs and your cat's respiratory system, so ventilation matters. If you have a cat with asthma or respiratory issues, wear a dust mask while handling litter.

Removing Old Litter Safely

Put on your gloves first. Use the scoop to remove all the litter from the box into your trash bag. Push the scoop to the bottom of the box to catch litter that has settled, and break up any clumps stuck to the sides. This step usually takes 3 to 5 minutes depending on how full the box is.

If litter is wet or matted to the bottom, use a plastic scraper or the edge of the scoop to loosen it. Don't force it—if it's stuck hard, let the box sit for a minute with a little water sprinkled on the stuck spot. Once all the old litter is out, tie the trash bag closed and dispose of it in your regular trash. Litter should not go down the toilet, even if it says "flushable," because it can clog pipes.

Cleaning the Box Between Changes

After you've removed the old litter, rinse the box with hot water from a hose or faucet. Use your hand or a cloth to wipe the inside and corners where urine has soaked in. Hot water kills bacteria that cause odor. Rinse again until the water runs clear and there's no soapy residue.

Skip bleach, ammonia, and strong cleaners—they can irritate your cat's paws and nose, and the smell may keep your cat from using the box. If the box is stained or smells even after rinsing, let it air dry in the sun for an hour or two, which naturally kills odor-causing bacteria. Dry the box with a towel or let it air dry completely before adding fresh litter. A wet box will clump the new litter when ready and make it harder for your cat to dig.

Adding Fresh Litter to the Box

Pour fresh litter into the clean, dry box until it reaches a depth of 2 to 3 inches. This depth lets your cat dig and bury waste without the litter spilling over the sides. Too little litter (under 1 inch) makes it hard for cats to cover their waste, which often leads to accidents outside the box. Too much (over 4 inches) wastes litter and makes the box harder to scoop.

Use the same brand and type of litter your cat is used to. Cats are particular about texture and scent—switching suddenly can cause them to avoid the box. If you need to change brands, mix the old and new litter for a few days so your cat adjusts gradually. Spread the litter evenly across the bottom so there are no bare spots or deep pockets.

Common Mistakes to Avoid

The most common mistake is not changing the box often enough. If you wait more than a week between full changes, bacteria builds up and the box starts to smell even if you scoop daily. Cats may stop using a dirty box and go elsewhere in your home instead.

Another mistake is using scented litter or heavily perfumed cleaners. Cats have sensitive noses, and strong smells can make them avoid the box. Stick with unscented litter and plain hot water for cleaning. Don't use cat litter deodorizers on top of the litter—they're unnecessary if you change the box regularly and can irritate your cat's respiratory system.

A third mistake is filling the box too full or too shallow. Both extremes make it harder for your cat to use the box properly. Aim for that 2 to 3 inch range every time. Finally, don't move the box to a new location right after changing it—your cat may not find it and will go elsewhere. If you need to move the box, do it gradually over several days.

When to Replace the Box Itself

Most litter boxes last 1 to 2 years with regular cleaning. Replace the box sooner if it cracks, develops permanent odor, or the sides are scratched so badly that litter spills constantly. Plastic boxes absorb urine over time, and even thorough cleaning won't remove the smell. If your cat suddenly stops using the box and you've ruled out health issues, a new box often solves the problem.

When you buy a new box, choose one that's at least 1.5 times the length of your cat from nose to tail. A box that's too small forces your cat into an uncomfortable position and may cause them to go outside the box. If you have multiple cats, the rule is one box per cat plus one extra, so a two-cat household should have three boxes in different locations.

Frequently Asked Questions

How often should I completely change the litter?

Once a week is standard for one cat in a regular-sized box. If you have two or more cats, change it twice a week or every four to five days. Scoop waste daily no matter what. If the box smells bad before a week is up, change it sooner—odor means bacteria is building up.

Can I use the same litter box for multiple cats?

You can, but it's not ideal. Cats prefer their own boxes, and sharing one box can cause stress and accidents outside the box. The general rule is one box per cat plus one extra. If space is tight, at least place boxes in different rooms so each cat has a private option.

What should I do if my cat stops using the box after I change it?

Switch back to the old litter brand when ready—cats often reject new litter types or scents. If the litter is the same, the box itself may be the issue. Make sure it's clean, in the same location, and filled to the right depth. If your cat still avoids it, a vet visit is worth it to rule out urinary tract infections or other health problems.

Is it safe to flush litter down the toilet?

No, even litter labeled "flushable" should go in the trash. Litter clumps in pipes and can cause blockages in your home plumbing or at the water treatment plant. Always dispose of litter in a sealed trash bag in your regular garbage.

Why does my litter box smell even after I clean it?

Bacteria in the box causes odor, not the litter itself. Make sure you're rinsing the box thoroughly with hot water and letting it dry completely before adding fresh litter. If the smell persists, the plastic may have absorbed urine permanently—replace the box. Scoop daily and change the box at least once a week to prevent odor buildup.