How Often Should You Change Cat Litter? Scoop vs. Scrub

The Ultimate Schedule: When to Clean?

How often should you scoop or change out all the kitty litter? The quick answer is: It depends.

Experts generally recommend scooping daily and changing the entire box monthly. However, this varies based on the type of litter (clumping vs. non-clumping) and the number of cats you have. Use this cheat sheet to find your schedule:

Litter Type Daily Task Deep Clean (Full Change)
Clumping (Clay/Tofu) Scoop Clumps Every 3 – 4 Weeks
Crystal (Silica) Stir Urine / Scoop Poop Every 3 – 4 Weeks (When yellow)
Non-Clumping (Paper/Pine) Remove Solids Every 3 – 7 Days (High Priority)
💡 PRO TIP: The 3-Inch Rule
Never let the litter get shallower than 3-4 inches (7-10 cm).
If the layer is too thin, urine will hit the plastic bottom and stick like glue (“cementing”). This creates permanent odors that scooping cannot fix. Always top off with fresh litter after scooping!

Phase 1: The Daily Routine (Scooping)

Think of this like flushing the toilet. You must do it at least once every 24 hours. If you have multiple cats or a small apartment, twice daily is even better.

How to Scoop Properly

Scooping takes less time than brushing your teeth. Here is the most efficient method:

  1. Dig & Sift: Using a slotted litter scoop, dig down into the litter. Shake the scoop gently side-to-side. The clean litter will fall back through the slots, leaving only the waste.
  2. Check Corners: Cats often pee in the corners. Scrape the sides and bottom of the pan to ensure no “hidden clumps” remain.
  3. Dispose: Dump the clumps into a sealed bag and dispose of them outside.
  4. Top Off: This is crucial. Add fresh litter to restore the 3-4 inch depth.

Phase 2: The Monthly Reset (Deep Clean)

Scooping removes the big stuff, but tiny bacteria and urine particles still accumulate over time. A full “Dump-and-Scrub” is necessary to reset the hygiene of the box.

The 4-Step Deep Clean

  1. Dump Everything: Place a garbage bag over the box and dump the entire contents. Do not try to “save” the clean-looking litter—it likely harbors bacteria.
  2. Wash with Soap: Scrub the litter box with hot water and mild dish soap. A bristled brush helps remove stuck-on residue.
  3. The “No Bleach” Rule: Warning: Never use bleach or ammonia-based cleaners. Cat urine contains ammonia; mixing it with bleach creates toxic chloramine gas. Plus, strong chemical smells may cause your cat to avoid the box.
  4. Dry & Refill: Dry the box completely with a paper towel. Moisture is the enemy of fresh litter (especially clumping clay). Refill with 3-4 inches of fresh litter.

Factors That Change Your Schedule

While the “Daily Scoop / Monthly Change” is the gold standard, these variables might require you to clean more often:

1. Number of Cats

The more cats you have, the faster the litter box gets dirty. A general rule is to have one box per cat, plus one extra. If you have 2 cats sharing 1 box, you may need to change the litter every 2 weeks instead of monthly.

2. Type of Litter

  • Clumping Litter: Absorbs urine into hard balls, making it easier to maintain. Needs a full change less often (every 3-4 weeks).
  • Non-Clumping Litter: Urine sinks to the bottom and is absorbed by the clay or pellets. Since you can’t scoop the pee out, the smell builds up faster. You must change the whole box weekly.

3. Your Cat’s Health

Cats with diabetes or kidney disease urinate more frequently and in larger volumes. If you notice the litter box is constantly wet, you will need to increase your cleaning frequency and consult a vet.

3 Signs You Waited Too Long

  • The “Sharp” Smell: If you smell ammonia (a biting, chemical odor) the moment you scoop, the litter is saturated. It’s time to dump it.
  • Cloudy Dust: Old litter breaks down into fine dust. If you see a dust cloud when the cat digs, it needs changing.
  • Crumbling Clumps: If the urine balls fall apart when you touch them, the litter has lost its binding power.

FAQ

Can I scoop every other day?
No. Would you flush your toilet every other day? Ammonia builds up within hours. Daily scooping prevents respiratory issues for both you and your cat and stops them from peeing on your bed.
What happens if I don't change the litter monthly?
Two things: Bacterial buildup and Box Aversion. Even if it looks clean, old litter holds bacteria. Your cat may start avoiding the box because it feels “gross,” leading to accidents around the house.
Why does my litter smell even after scooping?
You likely aren’t using enough litter. If you don’t follow the 3-Inch Rule, urine sticks to the plastic bottom of the pan. You need to scrub the box and keep the litter level deeper.