Replace warped litter trays with odour-neutral options

A warped tray is a real problem — once the base isn't flat, litter shifts unevenly and cats start stepping around it rather than into it, which usually ends badly for your floor. Hot-water cleaning is actually one of the fastest ways to distort budget plastic trays, so you're not alone here. Most litter boxes are already too small for the average cat — they need a box at least 1.5 times their body length to turn and dig properly — and covered boxes, while tidier, are often avoided by cats who feel trapped inside. Before I point you toward something that'll last and stay odour-neutral, can you tell me how many cats you have, roughly how big they are, and whether there are any current litter habits or avoidance issues I should know about?

That makes complete sense — and it's the plastic itself causing the problem. Scratched or heat-warped plastic becomes porous at a microscopic level, and bacteria lock into those grooves no matter how thoroughly you clean. You end up in a cycle of more aggressive cleaning, more warping, more odour. For a 4kg cat who kicks litter, you also need decent depth and high sides at the back. What I'd recommend is the Iris USA Open Top Cat Litter Box with a high back — but more relevantly for your situation, look at the Stelton litter box or, best fit here, the PetFusion Toughgrip Cat Litter Box. It's made from food-grade stainless steel, completely non-porous so odour has nowhere to hide, and it won't warp regardless of how you clean it. The high-sided version handles litter scatter well too.

They can be, but the transition is usually smoother than people expect when you do it right. Put the new box in exactly the same spot as the old one, add a small scoop of used litter from the old tray into the new one — familiar scent helps enormously — and leave both boxes available for a week or two if you can. Most cats switch over without fuss once they've investigated. The steel surface is actually cooler and smoother underfoot than plastic, and cats generally don't object to that. Since she has no avoidance history, she's low risk for a difficult transition.

Yes — since odour is your main driver, pair it with a clumping bentonite litter rather than a scented one. Scented litters mask smell for humans but can actually put cats off using the box. A good unscented clumping litter like Catsan Clumping or World's Best Cat Litter locks odour in the clump immediately, which means less ammonia building up between cleans. With a non-porous steel tray underneath, you'll notice a significant difference very quickly — the odour you were fighting was largely the tray itself holding bacteria, not the litter failing.

Good call — that combination should solve both problems at once. One last tip: give the steel box a quick wipe with a damp cloth weekly and a proper wash monthly, and it'll stay genuinely odour-free for years. No more replacing trays every time the plastic gives up on you.