The cat litter aisle is mostly bad products in shiny packaging. After years importing silica crystals — the raw material that goes into half the premium brands you've seen — I've watched the same playbook over and over: take a basic product, add a fragrance, slap "odor control" on the bag, charge a 30% premium.
If you're newly setting up a litter box or finally fed up with the smell, this post is what to skip. The pitfalls that waste money, annoy your cat, or actively make the odor problem worse.
For the positive version of this advice — what to actually buy and how to set up — start with our Crystal Cat Litter Starter Kit guide.
1. Skip Scented Litter
Cats have roughly 14 times more scent receptors than humans. A fragrance that smells "lightly floral" to you is overpowering to your cat. The American Association of Feline Practitioners has flagged heavily scented litters as a common cause of litter box avoidance — meaning, your cat just stops using the box.
Scented litter exists for one reason: it masks the smell of cheap, ineffective base material. A well-made litter doesn't need perfume to manage odor. The silica gel itself is naturally odorless and absorbs ammonia at the molecular level. If your litter relies on fragrance to work, it's compensating for something.
What to do instead: Use unscented litter. If you're worried about odor, the real fix is scooping daily and replacing on schedule — not adding more chemicals.
2. Skip Miracle Additives and Boosters
"Odor-eliminating crystals" you sprinkle on top of clay. Baking-soda-infused litters. Charcoal-activated everything. "Microban" treatments.
Most of these are gimmicks. Baking soda has mild odor-absorbing properties but at the quantities used in litter products, it doesn't meaningfully change performance. Activated charcoal sounds technical but doesn't reach the urine in a way that matters. Antimicrobial additives can interfere with the natural bacterial environment in the box without solving the actual smell.
The exception: if your vet recommends a specific additive for a medical reason (urinary tract monitoring litter, for example), use it. Otherwise, save the money.
What to do instead: A quality base litter, scooped daily, doesn't need additives. If yours does, switch litters.
3. Skip the Wrong-Size Box
Most litter boxes sold at pet stores are too small. A standard 16-inch box is fine for a kitten and torture for an adult Maine Coon.
Your cat should be able to turn around fully inside the box without their tail or paws hanging over the edge. If they can't, they'll start kicking litter out the sides (or worse, going outside the box entirely).
What to do instead: Buy a box at least 1.5x your cat's nose-to-tail length. Storage bins from a hardware store often work better than purpose-built litter boxes for big cats — they're cheaper, larger, and have higher sides.
4. Skip Overfilling the Box
This one's counterintuitive. People assume more litter = better absorption = less smell. Wrong direction.
A 2-3 inch layer of crystal litter is enough. Beyond that, you're just creating more material for your cat to kick around and more weight to lift when you change the box. The extra litter doesn't absorb more — the bottom layer never sees urine, so it stays dry and unused.
For clay litter, overfilling is even worse: clumps form deeper in the litter and become harder to fully scoop out, so you leave saturated material behind and odor builds up.
What to do instead: 2-3 inches of crystal litter, no more. You'll use less product and notice no difference in performance.
5. Skip the Covered Box (Usually)
Covered boxes feel like they should help with odor — trap the smell inside, problem solved. In practice, they often make it worse.
When odor is contained inside a covered box, your cat lives in it during every visit. Many cats hate this and either rush their business (which means incomplete elimination) or refuse the box entirely. The trapped humidity also accelerates bacterial growth, which is what actually produces the smell.
What to do instead: Use an open box in a well-ventilated room. If your cat is a kicker and you need walls, get a high-sided box rather than a covered one. The exception: if your cat strongly prefers privacy (some do), test it and see — but watch for box avoidance.
6. Skip Crowded Litter Spots
A box wedged behind a toilet, in a closet next to the water heater, or under a stairwell may seem space-efficient but it creates two problems:
- Poor ventilation means odor builds up and concentrates
- Stressful location means your cat avoids the box
The general rule from feline veterinary research: place boxes in quiet but accessible areas with good airflow. Not next to noisy appliances. Not in spots where dogs or kids ambush your cat.
What to do instead: Bathrooms, laundry rooms, or a dedicated corner of a low-traffic room. For multi-cat households, follow the n+1 rule: one box per cat, plus one extra, spread across different rooms.
7. Skip the "Multi-Cat Formula" Premium
This is the one that bugs me most as someone who's seen the supply chain. Most "multi-cat formula" litters are the same product as the regular formula with different packaging and a higher price.
Sometimes there's a marginal difference — slightly larger crystals, slightly more fragrance (which, see point 1, is actually bad). But the math doesn't add up to a 20-30% price premium.
If you have multiple cats, you don't need a special formula. You need more litter and more boxes (one per cat, plus one). That's it.
What to do instead: Buy regular crystal litter in bulk. With our 4-pack, three-cat households get about 30 days of clean odor control for about $88 — less per cat than most "multi-cat formula" brands charge for a single bag.
The Honest Setup
The whole "what to skip" list comes down to one principle: most of the cat litter industry exists to sell you upgrades to a basic product that mostly works on its own. Unscented. Right amount. Right size box. Open if your cat is okay with it. Quiet location. Scoop daily.
Crystal Clean is what we built when we got tired of the alternative. Same premium silica crystals the big brands use, no fragrance, no additives, no "multi-cat formula" markup. Shipped direct from our Chicago warehouse for less than the markups you'd pay at a pet store.
For more on what crystal litter actually is and whether it's safe, read our full breakdown here.
