Best Litter Boxes and How to Clean Them

Introduction

The litter box is one of the most important — and most underestimated — pieces of equipment in a cat owner's home. Get it right and your cat will use it reliably for years without issue. Get it wrong — the wrong size, the wrong location, insufficient cleaning — and you risk litter box avoidance, which is one of the most common reasons cats are surrendered or relinquished by frustrated owners who do not realise the problem usually lies with the setup rather than the cat.

Quick Summary: The ideal litter box is at least one and a half times your cat's body length, in a quiet, accessible location away from food and water. Most households need one litter box per cat plus one extra. Scoop daily and fully clean weekly using unscented soap — never bleach or strong-smelling products, which can deter cats from using the tray.

Choosing the Right Litter Box

Size Matters More Than Most Owners Realise

One of the most common litter box mistakes is choosing a tray that is simply too small. Cats need enough room to turn around fully, dig comfortably, and position themselves without their body touching the sides. As a general guideline, the litter tray should be at least one and a half times your cat's length from nose to base of tail. For most adult cats, this means a tray of at least 50–60cm in length — significantly larger than many commercially marketed 'standard' litter trays.

Open vs Covered Trays

This is a genuinely debated topic among cat behaviour experts, but the consensus increasingly favours open trays for most cats:

• Open trays: Allow odour to dissipate rather than concentrate, give cats a full view of their surroundings (important for cats who feel vulnerable while toileting), and are easier for owners to monitor and clean
• Covered trays: Can trap odour inside, creating an unpleasant environment that some cats find off-putting, and can make cats feel cornered or unable to see approaching threats (including other pets) while inside

Some cats genuinely prefer covered trays for privacy — if your cat seems happy with one and uses it reliably, there is no need to change. But if you are experiencing litter box avoidance issues, switching to an open tray is one of the first things to try.

Depth and Sides

The tray should have sides high enough to contain litter during digging but low enough for easy entry and exit — particularly important for kittens, senior cats, and cats with mobility issues such as arthritis. A tray that is too tall to enter comfortably can be a genuine deterrent.

Automatic Self-Cleaning Litter Boxes

Self-cleaning litter boxes — which use sensors to detect when a cat has used the tray and automatically rake waste into a separate compartment — have become increasingly popular. They offer genuine convenience benefits, particularly for busy households or those wanting to minimise daily scooping. However, some cats are initially wary of the noise and movement, requiring a careful introduction period. They also represent a more significant investment and require regular maintenance of their mechanical components.

How Many Litter Boxes Do You Need?

The widely recommended formula is: one litter box per cat, plus one extra. This means:

• 1 cat: 2 litter boxes
• 2 cats: 3 litter boxes
• 3 cats: 4 litter boxes

This formula exists because cats are naturally inclined to avoid using a tray that already contains waste from another cat, and having sufficient trays reduces resource competition and territorial stress, particularly in multi-cat households. Trays should also be distributed across different locations rather than lined up in a single area, which functions more like one large resource than several separate options from a cat's perspective.

Choosing the Right Location

• Quiet and low-traffic: Cats are vulnerable while toileting and prefer locations away from busy household activity, loud appliances, and high foot traffic
• Away from food and water: Cats instinctively avoid toileting near where they eat and drink — placing these too close together can cause both feeding and toileting avoidance
• Easily accessible: Avoid locations requiring cats to navigate stairs, squeeze through narrow gaps, or jump significant heights, particularly for kittens, senior cats, and those with mobility issues
• Multiple locations for multi-cat homes: Spread trays across different areas of the home rather than clustering them together
• Stable and quiet underfoot: Avoid placing trays near washing machines, tumble dryers, or other equipment that creates sudden loud noises, which can startle a cat mid-use and create a lasting negative association with the location

Choosing the Right Litter

Litter preference varies between individual cats, but general principles apply:

• Unscented is generally preferred: Most cats prefer unscented litter — heavily fragranced products that smell pleasant to humans can be overwhelming and off-putting to a cat's far more sensitive sense of smell
• Fine-grained, sand-like texture: Most cats show a preference for finer-textured litter that feels more similar to natural sand or soil, which their digging instincts are adapted to
• Clumping litter for easier cleaning: Clumping varieties allow complete removal of urine clumps, leaving cleaner, fresher litter remaining in the tray compared to non-clumping alternatives
• Introduce new litter gradually: If switching litter type, mix the new litter with the old gradually over 1–2 weeks rather than switching abruptly, which can cause avoidance

The Litter Box Cleaning Routine

Daily: Scoop

Remove solid waste and clumped urine at least once daily — twice daily for multi-cat households or particularly fastidious cats. This is the single most important habit for maintaining a litter box your cat will reliably use, and for controlling household odour effectively.

Weekly: Full Clean

Completely empty the tray, discard all remaining litter, and wash the tray thoroughly:

1. Wash with warm water and a small amount of unscented washing-up liquid or pet-safe cleaner
2. Scrub thoroughly, including corners and any textured surfaces where residue can accumulate
3. Rinse completely — any soap residue can be off-putting to cats and irritating to their paws
4. Dry completely before adding fresh litter
5. Add fresh litter to the recommended depth (typically 5–8cm)

What to Avoid When Cleaning

• Bleach: Never use bleach to clean litter trays — if it comes into contact with any residual ammonia from urine, it can produce toxic chloramine gas. Bleach is also simply unnecessary for this purpose.
• Strongly scented cleaning products: Can leave a lingering fragrance that deters cats from using the freshly cleaned tray
• Abrasive scourers: Can create micro-scratches in plastic trays that harbour bacteria and odour over time, similar to the issue seen with plastic water bowls

Managing Litter Box Odour

Beyond regular cleaning, several additional strategies help manage odour:

• Good ventilation: Position trays in well-ventilated areas rather than enclosed cupboards without airflow
• Activated carbon litter additives: Can be sprinkled into existing litter to boost odour absorption between full changes
• Dedicated air purifiers: An air purifier with activated carbon filtration positioned near the litter area can significantly improve air quality, particularly valuable in smaller homes or apartments where litter areas are closer to living spaces
• Replace trays periodically: Even with diligent cleaning, plastic litter trays develop scratches and odour absorption over years of use. Replacing trays every 1–2 years (more frequently for heavily used trays) ensures a genuinely fresh surface.

Recognising and Addressing Litter Box Avoidance

If your cat begins toileting outside the litter box, this is almost always a signal of a problem rather than 'bad behaviour' — investigate systematically:

1. Rule out medical causes first: Urinary tract infections, kidney disease, diabetes, and arthritis (making the tray physically difficult to access) can all cause litter box avoidance. A vet check is the essential first step.
2. Assess cleanliness: Is the tray being cleaned frequently enough?
3. Assess size and accessibility: Has your cat grown, or developed mobility issues that make the current tray unsuitable?
4. Assess location: Has anything changed near the tray — new noise, new foot traffic, a new pet?
5. Assess litter type: Has the litter brand or type recently changed?
6. Assess quantity: Are there enough trays for the number of cats in the household?

Conclusion

A well-chosen, well-maintained litter box setup is one of the most fundamental aspects of responsible cat ownership — and one that pays significant dividends in household harmony, hygiene, and your cat's overall comfort and wellbeing. Invest in an appropriately sized tray, choose the right location and litter, and commit to a consistent daily and weekly cleaning routine.

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