AIPERRO 2 Pack Stainless Steel Litter Box | XL Enclosed Cat Litter Boxes with Lid for Big Cats and Multi-Cats | High Sided, Anti-Urine Leakage | Non-Stick Bottom（Multi-Colored）

You need to move the litter box to a less-humid room. The steam/humidity is making it easier for you to smell the litter. Put in in a room and put a baby gate with a cat door in that doorway. We have this one https://amzn.to/4uQnOHT We also recently bought stainless steel litterboxes. They cannot be scratched like the plastic ones, therefore odors cannot be trapped in the box material itself. We have two cats, and one is a Maine Coon so we bought the 2-pack in the XL size here https://amzn.to/3QrumyQ For the litter we buy the Arm & Hammer brand, any variety. It is less 'dusty' and not overly-scented.

We have 3 air purifiers: 1 in the living room (main floor) 1 in our bedroom (top floor) and 1 in a spare room (top floor, where 1 of 2 litter boxes is). We scoop the litters once a day. They're stainless steel so they don't absorb odor like the plastic ones do. Adding the air purifiers made a big difference in the "cat box smell." Before, you could walk into our home and think Ah, cats live here and now you can walk in and be like Oh! You have cats?!? This is the one we bought 3 of, and the replacement filters are pretty inexpensive too https://amzn.to/4ogYKs7 Edited to add the litterboxes that we have https://amzn.to/4fAZmXn